Please help me with number 9 ASAP

An alternative to car buying is to make monthly payments for a period of time, and then return the vehicle to the dealer, or purchase it. this is called

Check all that apply. f is a function. f is a one-to-one function. c is a function. c is a one-to-one function.

The equation ip| = 2 represents the total number of points that can be earned or lost during one turn of a game. which best describes how many points can be earned or lost during one turn?