Please help im stuck and stuff not quite sure how to do this tho...

For the inequality |c| < |d| to be true, which of the following must be true?

What is the best estimate of the length of a football

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.