Question

Geometry help?

1. Which function is the inverse of f(x) = 4x-1?
A. f^-1(x)=1/4x-1
B. f^-1(x)=1/4x+1/4
C. f^-1(x)=x+1/4
D. f^-1(x)=4x+1

2. What is the value of f^-1(21)?
f(x)=2x+11?
f^-1(21)= ____

3. Which function has an inverse that is not a function?
A. f(x)=x^2
B. f(x)=2x
C. f(x)=x+2
D. f(x)=(square root)x

4. Which pairs of functions are inverses of each other?
Choose all answers that are correct.

A. f(x)=2x+3 and g(x)=0.5-3
B. f(x)=1/6x-2 and g(x)=6x-12
C. f(x)=1/3x+5 and g(x)=3x-15
D. f(x)=x^2+7 and g(x)= (square root)x-7