Answer:
- 2
Step-by-step explanation:
The average rate of change of f(x) in the closed interval [ a, b ] is
[tex]\frac{f(b)-f(a)}{b-a}[/tex]
Here [ a, b ] = [ 3, 7 ] and from the graph
f(b) = f(7) = 2
f(a) = f(3) = 10, hence
average rate of change = [tex]\frac{2-10}{7-3}[/tex] = [tex]\frac{-8}{4}[/tex] = - 2
