In quadrilateral abcd, diagonals ac and bd bisect one another: quadrilateral abcd is shown with diagonals ac and bd intersecting at point p. what statement is used to prove that quadrilateral abcd is a parallelogram?

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.