Answer:
2
Step-by-step explanation:
the rate of change is measured as
[tex]\frac{f(b) - f(a)}{b-a}[/tex] in the closed interval [ a, b ]
here [a, b ] = [- 4, 1 ]
f(b) = f(1) = 2 + 4 = 6
f(a) = f(- 4) = - 8 + 4 = - 4
average rate of change = [tex]\frac{6-(-4)}{1-(-4)}[/tex] = [tex]\frac{10}{5}[/tex] = 2
