Question

What is a rate of change in this function? I have a picture

Answer 1

Step 1

Pick any two points

(1,25) and (2,22)

Step 2

Find rate of change.

`\begin{gathered} \text{Rate of change = }\frac{22\text{ - 25}}{2\text{ - 1}} \\ \text{ = }(-3)/(1) \\ \text{ = -3 coins per wash} \end{gathered}`