If 3 sisters receive $180 and split it so that the middle sister gets twice as much as the youngest sister and the oldest sister gets three times as much the youngest sister, how much does the youngest sister get?

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.