Aman buy a certain number of litchis at 20 per rupee and equal number at 30 per rupee . he mixed them and sold them at 25 rupee . find his hair or loss percentage

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.