Shira's math test included a survey question asking how many hours students spent studying for the test.
The scatter plot below shows the relationship between how many hours students spent studying and their
score on the test. A line was fit to the data to model the relationship.

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.