The number of letters in stephanie's full name is twelve less than twice the number of letters in amy's full name. if the number of letters in stephanie's full name is multiplied by the number of letters in amy's full name and the product is 560, then how many letters are in amy's full name?

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.