Which set of ordered pairs represents y as a function of x ?
0, negative 10, 0, 11, 1, negative 8, 1, 4, 5, 5
5, negative 1, 5, 2, 5, 3, 5, negative 4, 5, 5
3, 2, 4, 1, 5, 0, 6, negative 1, 7, negative 2
6, 2, negative 3, 1, 5, negative 1, 2, 3, negative 3, 3