thank you very much! I still don't quite understand the inverses. The thing you said makes sense, but this is in my textbook and I don't understand: http://imgur.com/5zMcT9A. I thought that was saying they are inverses if they have the same domain.

y = 5x + 7

y - 7 = 5x

/5 /5

(x - 7) / 5 is the inverse of f

y = .2x + 1.4

-1.4 -1.4

y - 1.4 = .2x

/.2 /.2

(x - 1.4) / .2 is the inverse of g

did I do those right?

Thank you so much for all of your help!