Question

Which of the following relations is a function? x y

0 5
5 0
{(-1, 1), (0, 3), (-1, 5), (2, 7)} -5 0
5 -5
(All are different but it wouldnt let me drag the other images)

Answer 1

0.5, because 5 was used as a input to various outputs. And if you need a second answer also choose -5,0 because -5 is different than 5

Explanation: