Question

Find the average rate of change for f(x) = x2 − 8x + 15 from x = −3 to x = 2. A) −3 B) −9 C) 3 D) 9

Answer 1

-9 in usatest prep its b

Explanation:

Answer 2

The rate of change between these on average is -9

Explanation:

In order to find these, we need to evaluate the equation at both points.

x^2 - 8x + 15

-3^2 - 8(-3) + 15

9 + 24 + 15

48

This gives us the ordered pair of (-3, 48)

x^2 - 8x + 15

2^2 - 8(2) + 15

4 - 16 + 15

3

This gives us the ordered pair of (2, 3)

Now we use these two points in the slope formula to find the rate of change.

m(slope) = (y2 - y1)/(x2 - x1)

m = (48 - 3)/(-3 - 2)

m = 45/-5

m = -9