Answer:
-1/2
Step-by-step explanation:
Average rate of change of a function is given by
m = f(x2) - f(x1)
---------------
x2 -x1
m = f(4) - f(0)
---------------
4-0
We can get the values from the graph f(4) = 0 and f(0) = 2
m = 0-2
---------
4-0
m = -2/4
= -1/2
