Cece draws a graph representing her family's car trip to the beach. She wants to show her father that their gas 300 (9, 279) 250 mileage in miles per gallon was the same for the entire trip. Cece chose three points on the line and drew vertical line segments from the points to the x-axis. How can she use these E 200 (5, 155) 150 100 segments to prove that the gas mileage was constant for the trip? 50 11,31)- 2. 6. 10 The vertical line segments create three similar right triangles. Because the triangles are similar, the quotient of the length of the vertical side to the length of the horizontal side is the same for each triangle. These quotients are slopes between (0, 0) and the points Cece chose. Because Cece could have chosen any points on the line to make the similar triangles, the slope is constant for the whole line. So, the gas mileage is constant for the whole trip. Gasoline Used (gal) For the graph in the Example, find the slope between the origin and each of the points Cece chose. Distance (mi)

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
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For the graph in the Example find the slope between the orgin and each of the points Cece chose? 

 

Cece creates a graph representing her family's car trip to the beach to demonstrate to her father that their gas mileage in miles per gallon was consistent throughout the trip. She selects three points on the line and draws vertical line segments from these points to the x-axis. How can Cece use these segments to show that the gas mileage remained constant?

The vertical line segments form three similar right triangles. Because the triangles are similar, the ratio of the vertical side length to the horizontal side length is the same for each triangle. These ratios represent the slopes between (0,0) and the points Cece selected. Since Cece could choose any points on the line to create similar triangles, this consistent slope indicates that the gas mileage remained constant throughout the trip.

**Graph and Analysis:**

- The graph plots "Distance (mi)" on the y-axis and "Gasoline Used (gal)" on the x-axis.
- Points chosen by Cece: (1, 31), (5, 155), and (9, 279).
- Vertical line segments are drawn from each point down to the x-axis.

**Questions to Consider:**

1. For the graph in the Example, find the slope between the origin and each of the points Cece chose.
2. What was the gas mileage for the trip in the Example?

**Vocabulary:**

- **Slope:** For any two points on a line, the slope is the "rise" (change in y) over the "run" (change in x).
Transcribed Image Text:Cece creates a graph representing her family's car trip to the beach to demonstrate to her father that their gas mileage in miles per gallon was consistent throughout the trip. She selects three points on the line and draws vertical line segments from these points to the x-axis. How can Cece use these segments to show that the gas mileage remained constant? The vertical line segments form three similar right triangles. Because the triangles are similar, the ratio of the vertical side length to the horizontal side length is the same for each triangle. These ratios represent the slopes between (0,0) and the points Cece selected. Since Cece could choose any points on the line to create similar triangles, this consistent slope indicates that the gas mileage remained constant throughout the trip. **Graph and Analysis:** - The graph plots "Distance (mi)" on the y-axis and "Gasoline Used (gal)" on the x-axis. - Points chosen by Cece: (1, 31), (5, 155), and (9, 279). - Vertical line segments are drawn from each point down to the x-axis. **Questions to Consider:** 1. For the graph in the Example, find the slope between the origin and each of the points Cece chose. 2. What was the gas mileage for the trip in the Example? **Vocabulary:** - **Slope:** For any two points on a line, the slope is the "rise" (change in y) over the "run" (change in x).
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