Mr. Elliot needs to drain his above ground pool before the winter. The graph below represents the relationship between the number of gallons of water remaining in the pool and the number of hours that the pool has drained. Pool Water Level 11520 10080 M40 720 5760 2880 1440 10 Time (in hours) a. Write a function that models the situation above. b. What is the rate of change? What does it represent in the context of the problem? c. What is the x-intercept? What does it represent in the context of the problem? Water (in gallons)

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
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EX.1
**Pool Water Level Problem**

Mr. Elliot needs to drain his above ground pool before the winter. The graph below represents the relationship between the number of gallons of water remaining in the pool and the number of hours that the pool has drained.

**Graph Explanation:**

- The graph is titled "Pool Water Level."
- The x-axis is labeled "Time (in hours)" and ranges from 0 to 12 hours.
- The y-axis is labeled "Water (in gallons)" and ranges from 0 to 11,500 gallons.
- The graph is a straight, downward-sloping line, indicating a linear decrease in water level over time.
- Specific points marked on the line suggest regular decrements in water level.

**Questions:**

a. Write a function that models the situation above.

b. What is the rate of change? What does it represent in the context of the problem?

c. What is the x-intercept? What does it represent in the context of the problem?

d. What is the y-intercept? What does it represent in the context of the problem?

e. Over which interval, if any, is the function positive? What does it represent in the context of the problem?

f. Over which interval, if any, is the function negative? What does it represent in the context of the problem?
Transcribed Image Text:**Pool Water Level Problem** Mr. Elliot needs to drain his above ground pool before the winter. The graph below represents the relationship between the number of gallons of water remaining in the pool and the number of hours that the pool has drained. **Graph Explanation:** - The graph is titled "Pool Water Level." - The x-axis is labeled "Time (in hours)" and ranges from 0 to 12 hours. - The y-axis is labeled "Water (in gallons)" and ranges from 0 to 11,500 gallons. - The graph is a straight, downward-sloping line, indicating a linear decrease in water level over time. - Specific points marked on the line suggest regular decrements in water level. **Questions:** a. Write a function that models the situation above. b. What is the rate of change? What does it represent in the context of the problem? c. What is the x-intercept? What does it represent in the context of the problem? d. What is the y-intercept? What does it represent in the context of the problem? e. Over which interval, if any, is the function positive? What does it represent in the context of the problem? f. Over which interval, if any, is the function negative? What does it represent in the context of the problem?
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