If Kima runs for 5 seconds at a rate of 10.5 yards per second, then runs
for 8 seconds at a rate of 8 yards per second, how many TOTAL YARDS
does she run?

A.116.5 yards
B.18.5 yards
C.84 yards
D.119 yards

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.