A college student shovels driveways to cover his weekly expenses. The student charges $7 for each hour he spend shoveling driveways
Which 2 unknown quantities in this situation are related?
A. The number of hours the student spends shoveling driveways
B. The number of driveways the student shovels
C. The amount of money the student earns
D. The number of college students shoveling driveways
