Which function has an inverse that is also a function? Can someone please help me with this problem?

The function that has an inverse that is also a function is .

Step-by-step explanation:

The only function whose inverse is also a function is the linear function, also named first-order polynomial. The inverse of a linear function is also a linear function. That is:

The function that has an inverse that is also a function is .

(2,20) means that the 2 is 2 hours and 20 is 20$. so there both 20$ for 2 hours only the same price. like it says. so, the dunk tank and the bounce house are the same price (20$) for the same amount of time (2 hours).

hope i

answer: i don't understand it

step-by-step explanation: sorry