My math teacher sucks and didnt teach us anything so how do i solve this?

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.

The slope of the function is 0.5.

The answer is d, none of above hope i