Question

The college tuition change per year is a rate of change because it describes how an output quantity changes relative to the change in the input quantity. Formula: f(b)-f(a)/b-a

Answer 1

$\begin{gathered} f(a)=f(2001)=390\text{ \%} \\ f(b)=f(2020)=\text{ }1,180\text{ \%} \\ \text{Average change =}\frac{f(b)-f(a)}{b-a} \\ \text{Average change =}\frac{1,180-390}{2020-2001} \\ \text{Average change =}\frac{790}{19} \\ \text{Average change =}41.6\text{ \%} \\ \text{The average change is }41.6\text{ \%} \end{gathered}$