Average Rate of Change on Arbitrary Intervals

Each of the problems below is a link. If you click on the problem, it will take you to a YouTube video of a full, step-by-step solution for the problem.  You may try these problems as practice and use the videos to check your answer, or you can just watch the videos to see more worked-out example problems.

Find the average rate of change of f of x = 7x minus 2 on the interval left bracket a comma a + h right bracket
Find the average rate of change of g of x = x squared on the interval left bracket a comma a + h right bracket
Find the average rate of change of r of x = 3x squared minus 2x on the interval left bracket a comma a + h right bracket

Note: there is a mistake at the very end of this video. The answer should be 6a + 2h – 2, not 6a + 2h – 1.

Find the average rate of change of p of x = x cubed on the interval left bracket a comma a + h right bracket