Question

x y x y
4 3 2 7
8 6 4 10
12 9 10 19

which set is a proportional relation ship

Answer 1

The left set (4,3), (8,6), (12,9) is proportional. Each pair has y/x = 3/4, so y = (3/4)x.

The right set (2,7), (4,10), (10,19) is not proportional: y/x = 3.5, 2.5, 1.9 (not constant), so there is no single k with y = kx.