Does the table below represent a proportional relationship?

x 2 3 4 5
y -8 -12 -16 -20
No, because the ratios of y to x are not equal.
Yes, because all the ratios of y to x are equal to -4.
No, because the table has negative numbers.
Yes, because all the ratios of y to x are equal to -2.

Question

Does the table below represent a proportional relationship?

x	2	3	4	5
y	-8	-12	-16	-20
No, because the ratios of y to x are not equal.
Yes, because all the ratios of y to x are equal to -4.
No, because the table has negative numbers.
Yes, because all the ratios of y to x are equal to -2.

anonymous · Answer

A proportional relationship would follow

y = k x, where k is a constant.   Do these data fit that?

anonymous · Answer

What is the ratio of -8 to 2? -8 / 2 = -4
What is the ratio of -12 to 3? -12 /3 = -4
Keep going. Are they all -4?
If the ratio y/x (or x/y) is the same for each pair, they're proportional

anonymous · Answer

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anonymous · Answer

Did you read my post? Can you answer my question on the 3rd line? That will lead you to the answer.