The expression to calculate the average rate in the interval 3[tex]\frac{f(5)-f(3)}{5-3}[/tex]From the table f(5)=40 and f(3)=10.
[tex]\begin{gathered} \frac{f(5)-f(3)}{5-3}=\frac{40-10}{2} \\ =\frac{30}{2} \\ =15 \end{gathered}[/tex]
Thus, the average rate of change in the function over the interval 3 to 5 is 15.
