Which set of ordered pairs does represent a function? \{(-4, 2), (2, 3), (-7, 2), (-9, -4)\}{(−4,2),(2,3),(−7,2),(−9,−4)}< br /> \{(2, 5), (-8, 6), (8, 3), (-8, -4)\}{(2,5),(−8,6),(8,3),(−8,−4)} \{(1, -7), (-8, -6), (-9, -6), (-1, -2)\}{(1,−7),(−8,−6),(−9,−6),(−1,−2 )}
\{(2, 2), (-9, -8), (-4, -5), (-8, 2)\}{(2,2),(−9,−8),(−4,−5),(−8,2)}