Which set of ordered pairs does not represent a function?
O{(-4, – 7), (-5,–9), (-9,8), (8, – 7)}
O {(4,0),(-8,-9), (7, -9), (2,6)}
O {(-1,-1), (-3,-8), (-5, -3), (-5,0)}
{(-3, -5),(1,9), (-5, -5), (3, -3)}