Which sentence contains a misplaced modifier?
a. we smiled our approval and nodded to each other.
b. what a delightful after-dinner show you have given us!
c. to our surprise, she began a little dance in front of us.
d. with a hop and a skip, the door opened, and a little girl came in.

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.