Question

A family is driving home from Georgia. The graph shows the distance away 1 point from home, in miles, as a function of time, in hours. Use the graph to estimate the average rate of change from t=0 to t=7.2. **Round answer to 1 decimal place. ***

Answer 1

Basically we need to find the slope:

`\begin{gathered} avg=(f(b)-f(a))/(b-a) \\ \text{Where:} \\ a=0 \\ b=7.2 \\ f(a)=420 \\ f(b)=0 \\ avg=(0-420)/(7.2-0)=(-420)/(7.2)=-(175)/(3)\approx-58.33 \end{gathered}`