HELP ME WITH MY MOST RECENT QUESTION PLEASE IT'S DUE SOON

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.

Explain how the quotient of powers was used to simplify this expression.

What is the value of x in the equation 3x4y65, when y=4?