Pls ! susan earned 3,528 frequent flyer miles last year. in january she earned 526 more. in order to fly to spain for free for her summer vacation, she needs 5,400 miles. how many more frequent flyer miles does susan need to earn?

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.