Question

Find the inverse of f(x) where f(x) = ax + b. g

Answer 1

First, change f(x) to y
$y = ax + b$
then
$y - b = ax \\ \frac{y - b}{a} = x \: \: \: \: \: \: \: or \\ x = \frac{y - b}{a}$
then flip x to y, y to x
$y = \frac{x - b}{a}$
then change y to f^-1(x)
${f}^{ - 1} (x) = \frac{y - b}{a}$