Answer:
[tex]\large\boxed{-7\text{ }dollars\text{ }per\text{ }hour}[/tex]
Explanation:
The average rate of change is the ratio of the change in the dependent variable (Money Earned) to the change in the independent variable (Hour).
Thus, the average rate of change for the data from the 5th hour to the 8th hour is calculated using the points (5, 96) and (8, 75) from the graph. This is, what happens in the middle does not affect the average rate of change.
[tex]Rate\text{ }of\text{ }change=(\$75-\$96)/(8hour-5hour)[/tex]
[tex]Rate\text{ }of\text{ }change=(-\$21)/(3hour)=-7\text{ }dollars\text{ }per\text{ }hour[/tex]
