Please help me with either one or two. I appreciate the help!

What is the name used to describe a graph where for some value of x, there exists 2 or more different values of y?

Three students, javier, sam, and corrine, participated in a fundraiser where people donated a certain amount of money per lap that the student ran. each student also had some initial donations that were collected before the run. the equations that represent each student's total donation, y, based on the number of laps ran, x, is shown below. match each equation with the correct rate of change for that student.

Ebert used to make $22 an hour, but got a 10% raise. how much more will he make in a 40 hour work week with raise?