Question

Which table of ordered pairs represents a proportional relationship?

X: -3 -4 -5
Y: 3 2 1

X: -1 -3 -5
Y: 1 3 5

X: -2 -4 -6
Y: -5 -7 -9

X: -2 -3 -4
Y: 0 -1 -2

Answer 1

X: -1 -3 -5

Y: 1 3 5

Explanation:

Divide y by x for all the points. If the quotients are different, it is not proportional. If the quotients are equal, it is a proportional relationship.

A.

3/(-3) = -1

2/(-4) = -1/2

Not Proportional

B.

1/(-1) = -1

3/(-3) = -1

5/(-5) = -1

Proportional

C.

-5/(-2) = 5/2

-7/(-4) = 7/4

Not proportional

D.

0/(-2) = 0

-1/(-3) = 1/3

Not Proportional