Question

Which representation shows a non proportional relationship between x and y?

Answer 1

D.

Explanation:

If the value of y/x is the same for the given data it is proportional. From a graph we see its proportional if its a straight line passing through the origin.

So A is proportional.

Also equations of the form y = kx where k is a constant are proportional ( Choice B).

The answer is D because if we check 2 of the rows:

y/x = 3/5 = 0.6 for the last row and y/x is different

(y/x = 1.8 / 2 = 0.9) for the previous row.

For choice C, y/x values are constant.