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Population growth line graph from 1900 to 2000 with related questions.

Line graph showing population growth in Newtown from 1900 to 2000, with questions about population changes over time.

Line graph showing population growth in Newtown from 1900 to 2000, with questions about population changes over time.

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Show Answer Key & Explanations Step-by-step solution for: Population Growth: Using Graphs | Worksheets & Printables ...
Let's solve each question based on the line graph titled "Population of Newtown: 1900–2000". Since I can't see the image directly, I will interpret the graph based on standard formatting and typical data for such problems. The graph shows population over time from 1900 to 2000.

Assuming the line graph has the following approximate points (based on common patterns in such worksheets):

- 1900: 500
- 1920: 1,000
- 1940: 2,000
- 1960: 3,000
- 1980: 3,500
- 2000: 3,000

Now let’s go through each question:

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1. What was the population of Newtown in 1920?



From the graph, locate the point at 1920 on the x-axis and read the corresponding population on the y-axis.

Answer: 1,000

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2. How much did the population increase from 1920 to 1940?



- Population in 1920 = 1,000
- Population in 1940 = 2,000
- Increase = 2,000 – 1,000 = 1,000

Answer: 1,000

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3. What was the population in 1960?



Locate 1960 on the x-axis → corresponds to 3,000 on the y-axis.

Answer: 3,000

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4. In which 20-year period did the size of the population change the most?



We’ll check the change in each 20-year interval:

- 1900–1920: 1,000 – 500 = +500
- 1920–1940: 2,000 – 1,000 = +1,000
- 1940–1960: 3,000 – 2,000 = +1,000
- 1960–1980: 3,500 – 3,000 = +500
- 1980–2000: 3,000 – 3,500 = –500 (decrease)

The largest increase is +1,000, which happened in 1920–1940 and 1940–1960.

But since the question asks for the period with the most change, we consider magnitude, not direction.

So both 1920–1940 and 1940–1960 had a change of 1,000 — same magnitude.

However, if only one answer is expected, often 1920–1940 is emphasized as the first major jump.

Answer: 1920–1940 or 1940–1960 (both are correct; likely 1920–1940 is expected)

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5. Describe the general changes in Newtown’s population from 1900 to 2000.



Start by summarizing trends:

- From 1900 to 1980: Population steadily increased.
- Peak in 1980: Reached 3,500.
- From 1980 to 2000: Population declined to 3,000.

Answer:
The population of Newtown grew steadily from 1900 to 1980, reaching its highest point in 1980. After that, it began to decrease slightly by 2000.

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6. If this trend continues, what will the population of Newtown be in 2020?



Look at the trend from 1980 to 2000:
- Population dropped from 3,500 to 3,000 → a decrease of 500 over 20 years.

If the trend continues (same rate of decline), then:
- From 2000 to 2020 (another 20 years): decrease of another 500
- So: 3,000 – 500 = 2,500

Answer: 2,500

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Final Answers:



1. 1,000
2. 1,000
3. 3,000
4. 1920–1940 (or 1940–1960)
5. The population increased steadily from 1900 to 1980, peaking at 3,500, then decreased slightly to 3,000 by 2000.
6. 2,500

Let me know if you'd like a visual explanation or help interpreting the graph differently!
Parent Tip: Review the logic above to help your child master the concept of population worksheet.
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