Find the inverse of the function:

latex: f\left(x\right)=-\frac{1}{4}x+4f ( x ) = − 1 4 x + 4

group of answer choices
a. f − 1 ( x ) = − 1 2 x + 2

b. f − 1 ( x ) = 4 x + 16

c. f − 1 ( x ) = − 4 x + 16

d. f^{-1} (x)=\frac{1}{2}x+1