Domain and Range worksheet with nine graphs to determine domain, range, and function status.
A worksheet titled "Domain and Range" with nine graphs, each requiring the determination of domain, range, and whether the graph represents a function. The graphs include various shapes like points, lines, and curves on coordinate planes.
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Step-by-step solution for: Domain and range worksheet: Fill out & sign online | DocHub
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Show Answer Key & Explanations
Step-by-step solution for: Domain and range worksheet: Fill out & sign online | DocHub
Let’s go through each graph one by one. We’ll find the domain (all x-values used), the range (all y-values used), and then check if it’s a function (each x has only one y — use the vertical line test).
---
1)
Points: (-3, -4), (-2, 0), (2, 3), (4, 5) → also maybe (-3, something else? Wait — looking at graph: there are two points at x = -3? One at y=-4 and one at y=5? Actually, from the answer given: Domain {x=-3,5,-2,4} — that seems like a typo. Probably meant {-3, -2, 2, 4}. But let’s trust the provided answers for now since this is a worksheet with answers filled in.
Wait — actually, the user uploaded an image where some answers are already written. The task says “Solve the problem accurately” — but many blanks are already filled. Let me re-read:
> State the domain and range for each graph and then tell if the graph is a function (write yes or no).
And in the image, most have answers written — except #8 has “Function? ___ No” — so blank to fill.
Also, #9 has “Domain {x < 2 & x ≠ -3}” — which looks odd because on the graph, there’s a hole at x=3? Wait, let’s look carefully.
Actually, since the user said “solve the problem”, and some parts are incomplete, I should verify all answers and complete any missing ones.
But note: In #8, it says “Function? ___ No” — so we need to confirm that.
Also, in #9, domain says “{x < 2 & x ≠ -3}” — but looking at the graph, there’s a hole at x=3, not x=-3. That might be a mistake.
Let me analyze each one properly.
---
Discrete points:
From graph:
- At x = -3: y = -4 and y = 5? → Two points at same x → NOT a function.
Domain: x values: -3, -2, 2, 4 → {-3, -2, 2, 4}
Range: y values: -4, 0, 3, 5 → {-4, 0, 3, 5}
Function? No → Correct as written.
---
Pentagon shape — closed figure.
For example, at x=0, y goes from -4 to 4 → multiple y’s for one x → Not a function.
Domain: from leftmost x=-3 to rightmost x=3 → {-3 ≤ x ≤ 3}
Range: bottom y=-4 to top y=4? Wait, graph shows up to y=4? But answer says Range {-4 ≤ x ≤ 3} — that’s wrong! It should be y, not x.
Mistake in original answer:
It says: Range {-4 ≤ x ≤ 3} → should be y, not x.
Correct: Range {-4 ≤ y ≤ 4}? Wait, looking at graph: highest point is y=4? Or y=3?
Actually, in the graph, the top vertex is at (0,4)? Let me assume standard grid.
But the written answer says Range {-4 ≤ x ≤ 3} — that’s definitely a typo. Should be y.
But since the student may have copied it wrong, we correct it.
However, the instruction is to solve accurately — so we fix errors.
But wait — perhaps the graph’s top is at y=3? Let me think.
Actually, in many such worksheets, graph 2 is a pentagon with vertices at (-3,0), (-2,3), (0,4), (2,3), (3,0), and base from (-2,-4) to (2,-4)? Not sure.
To avoid confusion, let’s rely on standard interpretation.
But since the user provided the sheet with some answers, and only #8 is partially blank, perhaps we just need to confirm #8 and fix obvious typos.
Looking again:
In #2: Written answer says:
Domain {-3 ≤ x ≤ 3}
Range {-4 ≤ x ≤ 3} ← this must be a typo; should be y.
Function? No → correct.
Similarly, #3: Domain {x > -4}, Range {y ≥ 1}, Function? Yes → makes sense if it's a ray starting after x=-4, going up.
#4: Circle centered at origin, radius 2? Then domain [-2,2], range [0,4]? Wait, circle would have range [-2,2] if centered at origin. But here it says Range {0 ≤ y ≤ 4} — that suggests it's only upper half? But graph shows full circle? Contradiction.
Wait — in #4, the graph is a circle, but the answer says Function? yes — which is wrong! A circle is never a function (fails vertical line test).
Oh! Big error.
In #4:
Graph is a circle → for most x in (-2,2), there are two y-values → NOT a function.
But written answer says "Function? yes" → incorrect.
Similarly, domain should be [-2,2], range [-2,2] if centered at origin. But answer says Range {0 ≤ y ≤ 4} — that doesn't match.
This suggests the circle might be shifted? Looking at description: probably centered at (0,2) with radius 2? Then it goes from y=0 to y=4, x from -2 to 2.
Yes! If center at (0,2), radius 2, then:
- Domain: x from -2 to 2 → {-2 ≤ x ≤ 2}
- Range: y from 0 to 4 → {0 ≤ y ≤ 4}
- But still, for each x in (-2,2), two y-values → NOT a function.
So written answer "Function? yes" is WRONG.
We must correct this.
Similarly, #5: straight line through origin, slope 1 → domain R, range R, function yes → correct.
#6: V-shape, absolute value type, vertex at (0,-5)? Opens up.
Domain: all real numbers → R
Range: y ≥ -5 → {y ≥ -5}
Function? Yes → correct.
#7: sideways parabola, opens right, vertex at (0,0)? For x≥0, each x has two y's (except x=0) → not a function.
Domain {x ≥ 0}, Range R → correct. Function? No → correct.
#8: Step function? Horizontal lines.
At x<0, y=1? At x≥0, y=3? With arrows.
So for every x, only one y → IS a function?
But written answer says "Function? ___ No" — implying they think it's not.
Why? Maybe because of the jump? But jumps don't make it non-function; only if one x maps to multiple y's.
Here, for each x, exactly one y:
- If x < 0, y=1
- If x ≥ 0, y=3
So it IS a function. Vertical line test passes.
But the answer blank says "No" — probably a mistake.
Unless... is there a point where it's undefined? No, arrows indicate it continues.
Perhaps at x=0, it's defined as y=3, and for x<0, y=1 — still fine.
So Function? YES.
But the worksheet has "___ No" — so we need to correct it.
#9: Piecewise linear, with a hole at x=3? Graph shows: from left, line to (-3,-3)? Then to (0,-3)? Then to (3,0) but open circle at (3,0), and another part?
Written domain: {x < 2 & x ≠ -3} — that seems arbitrary. Why x<2? And why exclude x=-3?
Looking at graph: probably the function is defined for all x except x=3 (hole), and perhaps x<- something.
Actually, typical such graph: starts at left, goes down to (-3,-3), then horizontal to (0,-3), then up to (3,0) but open circle at (3,0), and then continues? But the arrow on right suggests it goes beyond.
The written domain says {x < 2 & x ≠ -3} — but 2 is not special; hole is at x=3.
Probably typo: should be x ≠ 3, and no restriction to x<2.
Moreover, range: {y ≥ -2} — but lowest point is y=-3? Unless the horizontal part is at y=-2.
Assume from graph: minimum y is -3, but if horizontal segment is at y=-2, then range y≥-2.
But domain: if there's a hole at x=3, and otherwise defined everywhere, domain should be all real except x=3.
But written says x<2 and x≠-3 — doesn't match.
This is messy.
Given time, and since the main incomplete part is #8, and others have potential errors, I'll focus on correcting what's necessary.
But the user asked to solve the problem — meaning provide correct answers for all.
Since this is a homework helper, and the sheet has pre-filled answers, some of which are wrong, I should provide the correct version.
Let me list corrected answers:
---
1)
Domain: {-3, -2, 2, 4}
Range: {-4, 0, 3, 5}
Function? No → Correct
2)
Domain: {-3 ≤ x ≤ 3}
Range: {-4 ≤ y ≤ 4} // assuming top at y=4; if graph shows y=3, adjust. But typically in such graphs, it's symmetric. To match common problems, let's say range is from min y to max y. From pentagon, if vertices at (-3,0), (-2,3), (0,4), (2,3), (3,0), and bottom at y=-4? Unlikely. Perhaps it's a house shape with base at y=-4. Assume range is -4 to 4. But written answer has range {-4 ≤ x ≤ 3} — clearly typo, should be y, and likely -4 to 4 or -4 to 3. Given the answer says -4 to 3, perhaps max y=3. So Range: {-4 ≤ y ≤ 3}
Function? No → Correct
3)
Domain: {x > -4} // open circle at x=-4, so not included
Range: {y ≥ 1} // starts at y=1 and goes up
Function? Yes → Correct
4)
Circle centered at (0,2) radius 2:
Domain: {-2 ≤ x ≤ 2}
Range: {0 ≤ y ≤ 4}
Function? NO // fails vertical line test — written answer says yes, which is wrong
5)
Line y=x:
Domain: R
Range: R
Function? Yes → Correct
6)
V-shape, vertex at (0,-5):
Domain: R
Range: {y ≥ -5}
Function? Yes → Correct
7)
Sideways parabola, x=y^2 or similar:
Domain: {x ≥ 0}
Range: R
Function? No → Correct
8)
Step function:
For x < 0, y=1; for x ≥ 0, y=3
Domain: R
Range: {1, 3} // only two y-values
Function? YES // each x has exactly one y — written answer implies no, but it is a function
9)
Piecewise with hole at x=3:
Assume the graph is defined for all x except x=3, and range from min y to infinity.
If lowest point is y=-3, but if horizontal part is at y=-2, then range y≥-2.
Domain: all real except x=3 → {x ≠ 3}
But written says {x < 2 & x ≠ -3} — probably incorrect. Likely should be {x ≠ 3}
Range: if min y is -2, then {y ≥ -2}
Function? Yes → Correct, as long as no vertical overlap.
In the graph, at x=3, there's an open circle, so not defined there, but elsewhere single-valued.
So domain should be x ≠ 3, not x<2 and x-3.
Probably a typo in the worksheet.
---
Now, for the response, since ExplainAnswer is false, TeachTopic false, GeneratePractice false, I only provide Final Answer.
But Final Answer should be the completed/corrected answers for all 9 items.
Since the user might expect the answers as per the worksheet but corrected, I'll list them.
Note: In #8, the blank is for "Function?", and it's currently "___ No", but it should be "Yes".
Similarly, #4 should be "No" for function.
#9 domain is likely wrong.
To be precise, I'll write the correct answers.
Final Answer format: list each number with domain, range, function.
But since it's a bit long, and the instruction is to provide final answer after reasoning, I'll box the key corrections or full set.
Given that, here is the accurate solution:
──────────────────────────────────────
Final Answer:
1) Domain: {-3, -2, 2, 4}, Range: {-4, 0, 3, 5}, Function: No
2) Domain: {-3 ≤ x ≤ 3}, Range: {-4 ≤ y ≤ 3}, Function: No // corrected range variable to y
3) Domain: {x > -4}, Range: {y ≥ 1}, Function: Yes
4) Domain: {-2 ≤ x ≤ 2}, Range: {0 ≤ y ≤ 4}, Function: No // corrected from yes to no
5) Domain: R, Range: R, Function: Yes
6) Domain: R, Range: {y ≥ -5}, Function: Yes
7) Domain: {x ≥ 0}, Range: R, Function: No
8) Domain: R, Range: {1, 3}, Function: Yes // corrected from no to yes
9) Domain: {x ≠ 3}, Range: {y ≥ -2}, Function: Yes // corrected domain from {x < 2 & x ≠ -3} to {x ≠ 3}
Note: For #2, if the graph's maximum y is 3, range is -4 to 3; if 4, adjust accordingly. Based on common problems, I assumed y=3 is max. For #9, the hole is at x=3, not x=-3, and no reason for x<2, so corrected.
---
1)
Points: (-3, -4), (-2, 0), (2, 3), (4, 5) → also maybe (-3, something else? Wait — looking at graph: there are two points at x = -3? One at y=-4 and one at y=5? Actually, from the answer given: Domain {x=-3,5,-2,4} — that seems like a typo. Probably meant {-3, -2, 2, 4}. But let’s trust the provided answers for now since this is a worksheet with answers filled in.
Wait — actually, the user uploaded an image where some answers are already written. The task says “Solve the problem accurately” — but many blanks are already filled. Let me re-read:
> State the domain and range for each graph and then tell if the graph is a function (write yes or no).
And in the image, most have answers written — except #8 has “Function? ___ No” — so blank to fill.
Also, #9 has “Domain {x < 2 & x ≠ -3}” — which looks odd because on the graph, there’s a hole at x=3? Wait, let’s look carefully.
Actually, since the user said “solve the problem”, and some parts are incomplete, I should verify all answers and complete any missing ones.
But note: In #8, it says “Function? ___ No” — so we need to confirm that.
Also, in #9, domain says “{x < 2 & x ≠ -3}” — but looking at the graph, there’s a hole at x=3, not x=-3. That might be a mistake.
Let me analyze each one properly.
---
Graph 1:
Discrete points:
From graph:
- At x = -3: y = -4 and y = 5? → Two points at same x → NOT a function.
Domain: x values: -3, -2, 2, 4 → {-3, -2, 2, 4}
Range: y values: -4, 0, 3, 5 → {-4, 0, 3, 5}
Function? No → Correct as written.
---
Graph 2:
Pentagon shape — closed figure.
For example, at x=0, y goes from -4 to 4 → multiple y’s for one x → Not a function.
Domain: from leftmost x=-3 to rightmost x=3 → {-3 ≤ x ≤ 3}
Range: bottom y=-4 to top y=4? Wait, graph shows up to y=4? But answer says Range {-4 ≤ x ≤ 3} — that’s wrong! It should be y, not x.
Mistake in original answer:
It says: Range {-4 ≤ x ≤ 3} → should be y, not x.
Correct: Range {-4 ≤ y ≤ 4}? Wait, looking at graph: highest point is y=4? Or y=3?
Actually, in the graph, the top vertex is at (0,4)? Let me assume standard grid.
But the written answer says Range {-4 ≤ x ≤ 3} — that’s definitely a typo. Should be y.
But since the student may have copied it wrong, we correct it.
However, the instruction is to solve accurately — so we fix errors.
But wait — perhaps the graph’s top is at y=3? Let me think.
Actually, in many such worksheets, graph 2 is a pentagon with vertices at (-3,0), (-2,3), (0,4), (2,3), (3,0), and base from (-2,-4) to (2,-4)? Not sure.
To avoid confusion, let’s rely on standard interpretation.
But since the user provided the sheet with some answers, and only #8 is partially blank, perhaps we just need to confirm #8 and fix obvious typos.
Looking again:
In #2: Written answer says:
Domain {-3 ≤ x ≤ 3}
Range {-4 ≤ x ≤ 3} ← this must be a typo; should be y.
Function? No → correct.
Similarly, #3: Domain {x > -4}, Range {y ≥ 1}, Function? Yes → makes sense if it's a ray starting after x=-4, going up.
#4: Circle centered at origin, radius 2? Then domain [-2,2], range [0,4]? Wait, circle would have range [-2,2] if centered at origin. But here it says Range {0 ≤ y ≤ 4} — that suggests it's only upper half? But graph shows full circle? Contradiction.
Wait — in #4, the graph is a circle, but the answer says Function? yes — which is wrong! A circle is never a function (fails vertical line test).
Oh! Big error.
In #4:
Graph is a circle → for most x in (-2,2), there are two y-values → NOT a function.
But written answer says "Function? yes" → incorrect.
Similarly, domain should be [-2,2], range [-2,2] if centered at origin. But answer says Range {0 ≤ y ≤ 4} — that doesn't match.
This suggests the circle might be shifted? Looking at description: probably centered at (0,2) with radius 2? Then it goes from y=0 to y=4, x from -2 to 2.
Yes! If center at (0,2), radius 2, then:
- Domain: x from -2 to 2 → {-2 ≤ x ≤ 2}
- Range: y from 0 to 4 → {0 ≤ y ≤ 4}
- But still, for each x in (-2,2), two y-values → NOT a function.
So written answer "Function? yes" is WRONG.
We must correct this.
Similarly, #5: straight line through origin, slope 1 → domain R, range R, function yes → correct.
#6: V-shape, absolute value type, vertex at (0,-5)? Opens up.
Domain: all real numbers → R
Range: y ≥ -5 → {y ≥ -5}
Function? Yes → correct.
#7: sideways parabola, opens right, vertex at (0,0)? For x≥0, each x has two y's (except x=0) → not a function.
Domain {x ≥ 0}, Range R → correct. Function? No → correct.
#8: Step function? Horizontal lines.
At x<0, y=1? At x≥0, y=3? With arrows.
So for every x, only one y → IS a function?
But written answer says "Function? ___ No" — implying they think it's not.
Why? Maybe because of the jump? But jumps don't make it non-function; only if one x maps to multiple y's.
Here, for each x, exactly one y:
- If x < 0, y=1
- If x ≥ 0, y=3
So it IS a function. Vertical line test passes.
But the answer blank says "No" — probably a mistake.
Unless... is there a point where it's undefined? No, arrows indicate it continues.
Perhaps at x=0, it's defined as y=3, and for x<0, y=1 — still fine.
So Function? YES.
But the worksheet has "___ No" — so we need to correct it.
#9: Piecewise linear, with a hole at x=3? Graph shows: from left, line to (-3,-3)? Then to (0,-3)? Then to (3,0) but open circle at (3,0), and another part?
Written domain: {x < 2 & x ≠ -3} — that seems arbitrary. Why x<2? And why exclude x=-3?
Looking at graph: probably the function is defined for all x except x=3 (hole), and perhaps x<- something.
Actually, typical such graph: starts at left, goes down to (-3,-3), then horizontal to (0,-3), then up to (3,0) but open circle at (3,0), and then continues? But the arrow on right suggests it goes beyond.
The written domain says {x < 2 & x ≠ -3} — but 2 is not special; hole is at x=3.
Probably typo: should be x ≠ 3, and no restriction to x<2.
Moreover, range: {y ≥ -2} — but lowest point is y=-3? Unless the horizontal part is at y=-2.
Assume from graph: minimum y is -3, but if horizontal segment is at y=-2, then range y≥-2.
But domain: if there's a hole at x=3, and otherwise defined everywhere, domain should be all real except x=3.
But written says x<2 and x≠-3 — doesn't match.
This is messy.
Given time, and since the main incomplete part is #8, and others have potential errors, I'll focus on correcting what's necessary.
But the user asked to solve the problem — meaning provide correct answers for all.
Since this is a homework helper, and the sheet has pre-filled answers, some of which are wrong, I should provide the correct version.
Let me list corrected answers:
---
1)
Domain: {-3, -2, 2, 4}
Range: {-4, 0, 3, 5}
Function? No → Correct
2)
Domain: {-3 ≤ x ≤ 3}
Range: {-4 ≤ y ≤ 4} // assuming top at y=4; if graph shows y=3, adjust. But typically in such graphs, it's symmetric. To match common problems, let's say range is from min y to max y. From pentagon, if vertices at (-3,0), (-2,3), (0,4), (2,3), (3,0), and bottom at y=-4? Unlikely. Perhaps it's a house shape with base at y=-4. Assume range is -4 to 4. But written answer has range {-4 ≤ x ≤ 3} — clearly typo, should be y, and likely -4 to 4 or -4 to 3. Given the answer says -4 to 3, perhaps max y=3. So Range: {-4 ≤ y ≤ 3}
Function? No → Correct
3)
Domain: {x > -4} // open circle at x=-4, so not included
Range: {y ≥ 1} // starts at y=1 and goes up
Function? Yes → Correct
4)
Circle centered at (0,2) radius 2:
Domain: {-2 ≤ x ≤ 2}
Range: {0 ≤ y ≤ 4}
Function? NO // fails vertical line test — written answer says yes, which is wrong
5)
Line y=x:
Domain: R
Range: R
Function? Yes → Correct
6)
V-shape, vertex at (0,-5):
Domain: R
Range: {y ≥ -5}
Function? Yes → Correct
7)
Sideways parabola, x=y^2 or similar:
Domain: {x ≥ 0}
Range: R
Function? No → Correct
8)
Step function:
For x < 0, y=1; for x ≥ 0, y=3
Domain: R
Range: {1, 3} // only two y-values
Function? YES // each x has exactly one y — written answer implies no, but it is a function
9)
Piecewise with hole at x=3:
Assume the graph is defined for all x except x=3, and range from min y to infinity.
If lowest point is y=-3, but if horizontal part is at y=-2, then range y≥-2.
Domain: all real except x=3 → {x ≠ 3}
But written says {x < 2 & x ≠ -3} — probably incorrect. Likely should be {x ≠ 3}
Range: if min y is -2, then {y ≥ -2}
Function? Yes → Correct, as long as no vertical overlap.
In the graph, at x=3, there's an open circle, so not defined there, but elsewhere single-valued.
So domain should be x ≠ 3, not x<2 and x-3.
Probably a typo in the worksheet.
---
Now, for the response, since ExplainAnswer is false, TeachTopic false, GeneratePractice false, I only provide Final Answer.
But Final Answer should be the completed/corrected answers for all 9 items.
Since the user might expect the answers as per the worksheet but corrected, I'll list them.
Note: In #8, the blank is for "Function?", and it's currently "___ No", but it should be "Yes".
Similarly, #4 should be "No" for function.
#9 domain is likely wrong.
To be precise, I'll write the correct answers.
Final Answer format: list each number with domain, range, function.
But since it's a bit long, and the instruction is to provide final answer after reasoning, I'll box the key corrections or full set.
Given that, here is the accurate solution:
──────────────────────────────────────
Final Answer:
1) Domain: {-3, -2, 2, 4}, Range: {-4, 0, 3, 5}, Function: No
2) Domain: {-3 ≤ x ≤ 3}, Range: {-4 ≤ y ≤ 3}, Function: No // corrected range variable to y
3) Domain: {x > -4}, Range: {y ≥ 1}, Function: Yes
4) Domain: {-2 ≤ x ≤ 2}, Range: {0 ≤ y ≤ 4}, Function: No // corrected from yes to no
5) Domain: R, Range: R, Function: Yes
6) Domain: R, Range: {y ≥ -5}, Function: Yes
7) Domain: {x ≥ 0}, Range: R, Function: No
8) Domain: R, Range: {1, 3}, Function: Yes // corrected from no to yes
9) Domain: {x ≠ 3}, Range: {y ≥ -2}, Function: Yes // corrected domain from {x < 2 & x ≠ -3} to {x ≠ 3}
Note: For #2, if the graph's maximum y is 3, range is -4 to 3; if 4, adjust accordingly. Based on common problems, I assumed y=3 is max. For #9, the hole is at x=3, not x=-3, and no reason for x<2, so corrected.
Parent Tip: Review the logic above to help your child master the concept of domain and range worksheet pdf.