You need to find the ratio or both x and y.
If their all equal, then it is proportional.
If it’s not equal, it isn’t proportional.
You would need to divide the numbers.
Let’s say that the top number in a table is 9 and the bottom number is 90.
You would divide 90/9 and get 10. If you divide the rest, and their all 10, then it is proportional.
