The tape diagram models the lengths of two snowboarding trails. The combined length of the trails is 2000 meters. How long is each trail? For Beginner Trail, there is only one rectangle. For Expert Trail, there are 4 rectangles.

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.