Question

Which set of ordered pairs represents a function

1) {(0,4)(2,4)(2,5)}
2){(6,0)(5,0)(4,0)}
3){(4,1)(6,2)(6,3)(5,0)}
4){(0,4)(1,4)(0,5)(1,5)}

And the other one I put a picture of but I don’t know if it worked lol

Answer 1

Question 2 is B and question 3 is “3”.

In both examples, the “x’s” are never repeated!! Each x is unique. As soon as you have two x values with DIFFERENT y values, it is no longer a function