Question

Which of the following relations is not a function?

{(0, 0), (1, 0), (2, 0)}
{(1, 2), (3, -5), (-1, 7)}
{(7, -1), (3, -2), (5, -2)}
{(-1, 3), (4, 2), (-1, 5)}

Answer 1

The answer is the last one (-1,3), (4,2), (-1,5) Hope this helps!

Answer 2

Is: {(-1,3), (4, 2), (-1, 5)}

Explanation:

Because the domain have 2 numbers are the same which is (-1) so that's not a function