For the function f (x) = (8-2x) 2, find f-1. Determine whether f-1 is a function.

A.

f-1 (x) =; f-1 is a function

B.

f - 1 (x) =; f-1 is not a function

C.

f-1 (x) =; f-1 is not a function

D.

f-1 (x) =; f-1 is a function

f (x) = (8-2x) 2=y

let 's find the inverse is

(8-2x) 2=y, (8-2x) = sqrt (y), and - 2x = sqrt (y) - 8, finally x = (-1/2) sqrt (y) + 4

the inverse is f^-1 (y) = (-1/2) √y + 4, when x=y

the inverse is f^-1 (x) = (-1/2) √x + 4

A: f-1 (x) =; f-1 is a function