Question

Anyone know how to answer this

Answer 1

Answer:

21

Step-by-step explanation:

The average rate of change of function f(x) from x = a to x = b is

$\dfrac{f(b) - f(a)}{b - a}$

Here we have

a = -1

b = 2

f(a) = f(-1) = 1

f(b) = f(2) = 64

$\dfrac{f(b) - f(a)}{b - a} =$

$= \dfrac{f(2) - f(-1)}{2 - (-1)} =$

$= \dfrac{64 - 1}{2 + 1}$

$= \dfrac{63}{3}$

$= 21$