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

D.

Step-by-step 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.

option a is correct.

step-by-step explanation:

scale factor: it is used to find proportional measurements.

proportions means having the same ratio.

scale factor is the ratio of the model measurement to the actual measurement in a simplest form.

or we can say that the ratio of any two corresponding lengths in two similar geometric figures

if the scale factor is more than 1, then it is an enlargement,

if the scale factor less than 1, then it is a reduction.

given the two geometric figure:

by definition of proportions, we have