Answer:
4
Explanation:
The average rate of change of any function f(x)within a interval [a,b] is given by the formula.
Avg rate of change=

In our problem , the limits are 0 and 2 , that means ,
b=2
a=0
Also we are given values of function at 2 and 0.
f(2)=8
f(0)=0
Let us put these values in our formula
Avg rate of change=

Avg rate of change=

Avg rate of change=

Answer = 4