How do I find the average rate of change of the function from x1 to x2?

The function is f(x)= -2x + 15 and x1= 0, x2= 3

1 Answer
Nov 30, 2017

The average rate of change is #-2#.

Explanation:

Average rate of change is Algebra I slope, so

#m = (f(3)-f(0))/(3-0) = (9-15)/3=-2#.

In this case #f(x)# is linear, so the average rate of change will be equal to the slope of the line on all intervals.