Question

How do you know if a relationship between two quantities is NOT proportional?​

Answer 1

Answer:

Just divide y by x for every single term, and if they get the same quotient, they are proportional.

For example:

x   y

2   4         Divide 4/2. This equals 2.

6  12        Divide 12/6. This equals 2.

4   8         Divide 8/4. This equals 2.

Therefore, these quantities are proportional.