Question

(a) how far does ivanna travel per revolution?
feet
(b) what is the slope of the graph?

Explanation:

Step1: Recall slope - distance per revolution relationship

The distance traveled per revolution is equal to the slope of the linear graph of number of revolutions vs distance traveled.

Step2: Use two - point formula for slope

Let's assume two points on the line: $(x_1,y_1)$ and $(x_2,y_2)$. The slope $m=\frac{y_2 - y_1}{x_2 - x_1}$. If we assume the line passes through $(0,0)$ and say $(40,8)$ (from the general look of the graph where $x$ is distance and $y$ is number of revolutions), then $m=\frac{8 - 0}{40-0}=\frac{8}{40}=\frac{1}{5}$.

Answer:

(a) $\frac{1}{5}$ feet
(b) $\frac{1}{5}$