Question

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

Answer 1

f(x) = 1/9x + 2

To find the inverse, we need to do this:

Replace f(x) with y

y = 1/9x + 2

Replace x with y

x = 1/9y + 2

Solve for y

Subtract 2

x - 2 = 1/9y

Multiply by 9

9x - 18 = y

Replace y with f^-1(x)

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