Inverse Functions

If f is a function from a set A to a set B, an inverse function is from B to A. If input x produces an output y then an inverse function would be input y and output x
Domain-all possible set of input usually (x) values
Range-all possible set of outpt usually y values
Purplemath discusses what weere goin over in class today which is how to find a function's domain and range
http://www.purplemath.com/modules/fcns2.htm