The mapping diagram shows a relation.

what is the domain of the relation?

{x| x = –4 , 0, 1, 2}.

{x| x = –7, –6, 2, 11, 3}.

{y| y = –4, 0, 1, 2}.

{y| y = –7, –6, 2, 11, 3}.

I can't see the diagram but when you talk about domain you mean x values so the answers are the first or second options.

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.