What is the inverse of y = 3x + 9?

1 Answer
Feb 7, 2016

y=(x-9)/3

Explanation:

To find the inverse of a function, all we need to do is solve for the independent variable and then switch these variables.

y = 3x + 9

y - 9 = 3x

(y-9)/3 = x

x = (y-9)/3

Switch x for y and vice versa:

y = (x-9)/3

Here's a graph of both functions together: