What is the ratio of the amount of time she spent practicing the piano to the amount of time spent doing homework to the amount of time spent reading? Give your answer in the simplest form.

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.