Question

Find inverse function
f(x) = -3x + 9​

Answer 1

`f^(-1) (x) = (-x)/(3) +3`

Explanation:

y = -3x + 9​ ⇌ 3x = 9 - y ⇌ x = -y/3 + 9/3 ⇌ x = -y/3 + 3