Ezra works two summer jobs to save for a laptop that costs at least $1100. he charges $15/hr to mow lawns and $10/hr to walk dogs. this situation is modeled by: 15x + 10y ≥ 1100. suppose ezra decides to also spend more than $80 on a printer. the inequality becomes 15x + 10y .

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.