Question

Calculate the average rate of change over the interval [−2,1]
given the function f(x)=x2−3x+2
.(1 point)

12

−12


4

−4

Incorrect

Use the average rate of change formula f(b)−f(a)b−a and check your calculations with negative numbers.
Remaining

Answer 1

Average rate of change = (f(1) − f(−2)) / (1 − (−2)).

f(1) = 1 − 3 + 2 = 0
f(−2) = 4 + 6 + 2 = 12

So (0 − 12) / 3 = −12 / 3 = −4.