One person working alone will take 30 days to paint an apartment. If d represents the number of days taken to complete the work and p represents the number of people working, the equation that represents this situation is
. If 10 people work on this job, they take
days to complete it.

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.