In which choice below is y a function of x?O (9,6) (8,7) (9, 10) (10, 11)O (1, 2) (3, 4) (5, 6) (7,8)O (8,2) (8,4) (8, 6) (8,8)O (-4, 4) (-5,5) (-6, 6) (-4, 0)