Question

Let f(x) = x^2-4
What is the average rate of change of f(x) from -5 to -2 ?
A. -7
B. -1/7
C. 7
D. 1/7

Answer 1

Answer:

A. -7.

Step-by-step explanation:

f(-5) = (-5)^2 - 4 = 21.

f(-2) = (-2)^2 - 4 = 0.

Average rate of change =[ f(-2) - f(-5)] / ( -2 - (-5))

= (0 - 21) / 3

=  -7.