what is the average rate of change of the function from x 1 to x 3

what is the average rate of change of the function from x 1 to x 3. There are any references about what is the average rate of change of the function from x 1 to x 3 in here. you can look below.

Showing posts matching the search for what is the average rate of change of the function from x 1 to x 3