Scores on the wechsler adult intelligence scale (wais) approximate a normal curve with a mean of 100 and a standard deviation of 15. what proportion of iq scores are below 82

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.