Answer:
The best estimate for the average rate of change is [tex]-2[/tex]
Step-by-step explanation:
we know that
the average rate of change using the graph is equal to
[tex]\frac{f(b)-f(a)}{b-a}[/tex]
In this problem we have
[tex]f(a)=f(0)=0[/tex]
[tex]f(b)=f(4)=-8[/tex]
[tex]a=0[/tex]
[tex]b=4[/tex]
Substitute
[tex]\frac{-8-0}{4-0}=-2[/tex]
