Which pair of functions are inverse function?

inverse functions is when the x and y coordinates are interchanged

Step-by-step explanation:

(1,2) and (2,1) are inverse functions. in other words they are flipped at the y=x line

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!

agree

step-by-step explanation: