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