Question

If f(x)=9x-8, which of the following is the inverse of f(x)?

Answer 1

$f(x)=9x-8\\ y=9x-8\\ 9x=y+8\\ x=\dfrac{1}{9}y+\dfrac{8}{9}\\ f^{-1}(x)=\dfrac{1}{9}x+\dfrac{8}{9}$