I previously mentioned PatrickJMT‘s many many videos as a great resource to help you review and understand the material.

Another popular source of videos is the Khan Academy (created by a guy named Sal Khan). You can find videos organized into courses, not only on math but on many other academic subjects as well.

For example, he has sets of videos on Algebra, Algebra 2, and Precalculus. Here is a couple videos from the Algebra 2 sequences on Functions and Graphs which cover some of the topics we discussed from Chapter 2:

Evaluating with function notation

Introduction to piecewise functions: Sal explains what a piecewise function is, and finds the formula of a piecewise function given its graph:

Finally, if you’re interested, here is a TED talk Salman Khan gave 5 years ago, where he discusses how and why he created Khan Academy: “Let’s use video to reinvent education.”