What is the inverse of the function f(x)=2x+6f(x) = 2x + 6f(x)=2x+6?
f−1(x)=x−6f^{-1}(x) = x - 6f−1(x)=x−6
f−1(x)=2x−6f^{-1}(x) = 2x - 6f−1(x)=2x−6
f−1(x)=x−62f^{-1}(x) = \frac{x - 6}{2}f−1(x)=2x−6
f−1(x)=x+62f^{-1}(x) = \frac{x + 6}{2}f−1(x)=2x+6