Question

What is the inverse of the function f(x) = (1/9)x + 2?

Answer 1

f^(-1)(x) = 9x - 18

Explanation:

f(x) = (1/9)x + 2

x = (1/9)y + 2

x - 2 = (1/9)y

When you multiply both sides by 9 you isolate y giving you

9(x - 2) = y,

f^(-1)(x) = 9x - 18