15. Ms. Mason is a kindergarten teacher whose gross income last year was $34,200. She made a $2000 contribution to an IRA. If she takes a standard deduction of $5700, claims only herself as an exemption for $3650, and she makes no further adjustment to her income, find the amount of taxes she has to pay.

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.