Answer:
Student B
Step-by-step explanation:
Proportional relationship means that it follows a certain pattern or is constant.
Student B was the only relationship to be constant as it goes by multiples of 6.
Ex. 6, 12, 18, 24, 30.
Student B's wages increase by 6 each time, but Students A, C, and D do not steadily increase. The steady increase of 6 for Student B is what makes their wages proportional.
