Well, Finals are coming up so I'm reviewing, and I'm already in need of some help!

This problem isn't hard, I just can't remember how to do it.

1) In exercise 1, find the average rate of change of the function over the given interval or intervals

f(x)=X^3+1

a. [2.3] b. [-1,1]

>>Answer = 19, 1

I'll be posting in here a lot throughout the day, so I'll be checking back often. As always, any help is greatly appreciated!