For a fundraiser Marcus needs to raise $850 in order to meet his goal. Marcus will walk a certain number of miles and he will receive donations for each mile he walks. The table represents the amount of money he has left to raise after x miles of walking

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.