Write a rational equation based upon the word problem you created. it will take ana 4 hours to fully paint her room on her own. but christian only take 2 hours. how long would it take them to paint ana’s room if they work together?

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.