Answer
Net Change: $-6$
Average Rate of change: $-3$
Work Step by Step
From the graph, we are given the following points:
$(1, 5) (3, -1)$
Net Change: $f(3) - f(1) = -1 - 5 = -6$
Average Rate of change: $\frac{f(3)- f(1)}{3-1} = \frac{-6}{2} = -3$