## College Algebra 7th Edition

(a) $4$ (b) $\frac{2}{3}$
(a) We calculate the net change between the two points given: Net change = $f(5)-f(-1)=4-0=4$ (b) We calculate the average rate of change between $(-1,0)$ and $(5,4)$: Average rate of change = $\frac{4-0}{5--1}=\frac{4}{6}=\frac{2}{3}$