Which of the following relations are functions? {(0,1), (0,2), (5,2), (-5,2), (5,7)}
O {(-3,2), (-2,2), (1,2), (-3,1), (0,3)}
{(-1,6), (-2,8), (-1,2), (-5,1), (0,6)}
{(-2, 6), (2,0), (3,6), (4.-1), (5. 3)}