Which of the following best describes the inverse of the function f(x)=2x−4f(x) = 2x - 4f(x)=2x−4?
f−1(x)=12x+2f^{-1}(x) = \frac{1}{2}x + 2f−1(x)=21x+2
f−1(x)=12x−2f^{-1}(x) = \frac{1}{2}x - 2f−1(x)=21x−2
f−1(x)=2x+4f^{-1}(x) = 2x + 4f−1(x)=2x+4
f−1(x)=x+2f^{-1}(x) = x + 2f−1(x)=x+2