Which table shows a proportional relationship between x and y?


A.x 1 2 3 4

y 6 8 10 12


B.x 2 4 7 8

y 6 10 21 24


C.x 40 50 60 90

y 8 10 14 18


D.x 4 7 8 10

y 2 3.5 4 5