Find the inverse of f(x)=3x−9f(x) = 3x - 9f(x)=3x−9.
f−1(x)=x−93f^{-1}(x) = \frac{x - 9}{3}f−1(x)=3x−9
f−1(x)=3x+9f^{-1}(x) = 3x + 9f−1(x)=3x+9
f−1(x)=9−3xf^{-1}(x) = 9 - 3xf−1(x)=9−3x
f−1(x)=x+93f^{-1}(x) = \frac{x + 9}{3}f−1(x)=3x+9