For a given recipe, 14 cups of flour are mixed with 4 cups of sugar. How many cups of flour should be used if 6 cups of sugar are used?
Assuming a constant ratio, fill out the table of equivalent ratios until you have found
the value of x.

The first one, i believe, would be correct. all the others have one thing in common, and that's that they have repeating numbers. in the second one, x and y have repeating 6's and 3's, and in the third, x and y have repeating 6's as well. in the last one, there are repeating 3's. the first one has no repeating numbers.