What was the average velocity for the first 50 cm, the second 50 cm, and for the entire trip of 100 cm? Be sure to include the appropriate units with your values. PLEASE AWSER ASAP

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.