Math: the inverse, part 1

Tutoring math, inverses come up. The tutor begins about them.

Simply put, an inverse takes (x,y) and makes it (y,x). If f(x) yields y, then f^-1(y) yields x.

To get the inverse algebraically, one interchanges x with y. For instance, the inverse of y=3x is x=3y. Typically, one will solve for y after interchanging.

Source:

sfu.ca

ncl.ac.uk