Let’s go step by step to answer each question based on the line plot.
We’ll count the X’s above each attendance percentage. Each X = 1 student.
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Question 1: How many students have attendance of 94%?
Look at 94% on the number line. Count the X’s above it.
There are
4 X’s above 94%.
→ Answer:
4
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Question 2: What was the highest attendance in the class?
Look for the rightmost X on the plot.
The last X is above
99%.
→ Answer:
99%
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Question 3: What was the lowest attendance in the class?
Look for the leftmost X on the plot.
The first X is above
85%.
→ Answer:
85%
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Question 4: How many students have their attendance in the 80's?
That means from 85% to 89% (since 80–89 includes 85, 86, 87, 88, 89).
Count X’s above:
- 85% → 4 X’s
- 86% → 2 X’s
- 87% → 6 X’s
- 88% → 1 X
- 89% → 0 X’s
Add them: 4 + 2 + 6 + 1 + 0 =
13
→ Answer:
13
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Question 5: How many students have their attendance in the 90's?
That means from 90% to 99%. But note: 90% and 91% have no X’s.
So we count from 92% to 99%:
- 92% → 2 X’s
- 93% → 0
- 94% → 4 X’s
- 95% → 0
- 96% → 2 X’s
- 97% → 2 X’s
- 98% → 4 X’s
- 99% → 1 X
Add: 2 + 0 + 4 + 0 + 2 + 2 + 4 + 1 =
15
Wait — let me double-check:
Actually, “in the 90’s” usually means 90–99 inclusive. So include 90%, 91%, etc., even if zero.
But since 90% and 91% have 0, they don’t add anything.
So total = 2 (92) + 4 (94) + 2 (96) + 2 (97) + 4 (98) + 1 (99) =
15
→ Answer:
15
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Question 6: How many students have attendance of 93% or less?
That means all students with attendance ≤ 93%.
So we count everything from 85% up to 93%.
We already counted 85–89: 13 students.
Now add 90–93:
- 90% → 0
- 91% → 2 X’s
- 92% → 2 X’s
- 93% → 0
So 90–93 adds: 0 + 2 + 2 + 0 = 4
Total = 13 (from 80s) + 4 =
17
Wait — let’s list all percentages from 85 to 93:
85: 4
86: 2
87: 6
88: 1
89: 0
90: 0
91: 2
92: 2
93: 0
Sum: 4+2=6; +6=12; +1=13; +0=13; +0=13; +2=15; +2=17; +0=17
→ Answer:
17
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Question 7: How many students are there in the class?
This is the total number of X’s across the entire plot.
We can add:
From Q4: 85–89 → 13
From Q5: 92–99 → 15 (but wait, that skipped 90,91,93 which are 0 anyway)
But better to do full count:
List all:
85: 4
86: 2
87: 6
88: 1
89: 0
90: 0
91: 2
92: 2
93: 0
94: 4
95: 0
96: 2
97: 2
98: 4
99: 1
100: 0
Now sum:
Start adding:
4 + 2 = 6
+6 = 12
+1 = 13
+0 = 13
+0 = 13
+2 = 15
+2 = 17
+0 = 17
+4 = 21
+0 = 21
+2 = 23
+2 = 25
+4 = 29
+1 = 30
+0 = 30
Total =
30 students
Check another way:
Q6 said 93% or less = 17
Then 94% and above: 94(4), 96(2), 97(2), 98(4), 99(1) → 4+2+2+4+1 = 13
17 + 13 = 30 → matches.
→ Answer:
30
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Final Answer:
1. 4
2. 99%
3. 85%
4. 13
5. 15
6. 17
7. 30
Parent Tip: Review the logic above to help your child master the concept of mean median mode range number line.