Question

What is the average rate of change between x = 7 and x = 12 in the function below?
x ; x < 5
f(x) = x + 2 ; 5 < x < 10
3x ;x > 10

Answer 1

ANSWER CHOICES

A. 5 2/5

B. 5

C. 27

D. 2 7/15

Answer 2

Seems that I was wrong, haha.

Answer 3

@bmp thanks for the help anyway but do yu know how to do this by the answer choices given?

Answer 4

A. 5 2/5

Answer 5

Avg = Δ y/ Δ x

Answer 6

Δy = f ( 12) - f ( 7 ) / ( 12 - 7)
= ( 36 - 9 ) / 5 = 27/ 5