Question

Which table shows a proportional relationship between x and y?

x 3 9 10 15
y 1 3 4 5


x 4 6 8 10
y 6 8 10 12


x 1 5 8 10
y 15 75 120 150


x 2 3 5 6
y 3 4 7 9

Answer 1

the third table listed here

Explanation:

A "proportional" relationship has the same y/x ratio for all values of x and y.

... first table: all entries but one have y/x = 1/3. The 3rd entry has y/x = 0.4—not the same.

... second table: 6/4 ≠ 8/6

... third table: all entries reduce to y/x = 15

... fourth table: 3/2 ≠ 4/3