Question

Use the formula f(b)−f(a)b−a to calculate the average rate of change over the interval [−2,−1] given the function table for y=3x+2. Express your answer as an integer.



The average rate of change is _____.

(1 point)

1

2

-1

-2

Answer 1

f(-2)=3(-2)+2=-4, f(-1)=3(-1)+2=-1.
Average rate = (f(-1)-f(-2))/(-1-(-2)) = (-1 - (-4))/1 = 3.

So the average rate of change is 3 (none of the listed choices match).