I don't know where I'm going with this. I think my reasoning is out of whack, can someone please explain this to me?

http://img3.imageshack.us/img3/4803/43706846.jpg

Alright, so when f(x)=3, the x is a 1. And when x is a one over at the g(x) side where x is, it's a -1. So -1 x 3 = -3...B.