Which function has an inverse that is a function ?

C

Step-by-step explanation:

Step-by-step explanation:

A fuction has an inverse if it passes vertical line test.

is a horizontal U shaped graph . when we draw a vertical line then it crosses the inverse graph at two points. So it is not a function.

Inverse graph is a vertical line that does not pass vertical line test. so it is not a function.

Inverse graph is a graph of a line (linear function). Linear function always passes vertical line test. Inverse is a function

Inverse of absolute funciton does not pass vertical line test, so it is not a function.

or

step-by-step explanation:

we need to solve for 'x' the following equation:  

we have that:

⇒

⇒ ⇒

factorizing, we get that:

  ⇒

then, the solutions are: or

nothing extraneous has been found!