Here are some tutorial videos of chapter 3:
functions: http://youtu.be/dU7ZYr6o0qA
relations and functions: http://youtu.be/Tck1KurFg2c
standard forms and linear functions: http://youtu.be/xImDai43tR0
slope and rate of change: http://youtu.be/MAsWm4u7RO4
writing linear equations: http://youtu.be/-YURXuqYe3o
linear regression: http://youtu.be/x4E6RIzPBJE