At the start, a jar contains only quarters and coins of lesser value. The average value of these coins is $0.16. Adding a quarter to the jar raises this average value to $0.17. What is the probability that a coin randomly selected from the jar at the start is a quarter?

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.