Question

how do you find the inverse of a function?

Answer 1

Reflect it across the line y=x. A function only has an inverse if it is a one-to-one function or there is a domain restriction.

Answer 2

You take the x value and the y values, swap them, and then change it to where it's now y = blah blah.

For example, 3x + 7 = y

1. swap out letters: 3y + 7 = x
2. 3y = x - 7
3. y = (x-7)/3