# Average rate of change

Find the average rate of change of a function over a given interval.

### Problem

Consider the function h, which is defined over all real numbers. The function table below shows the function values of h for inputs between minus, 5 and 5.
What is the average rate of change of h over the interval open bracket, 1, comma, 2, close bracket?
Give an exact number.
space
Over which interval does h have a positive average rate of change?
Please choose from one of the following options.
xminus, 5minus, 4minus, 3minus, 2minus, 1012345
h, left parenthesis, x, right parenthesis6420minus, 1minus, 2minus, 30369