Which set of ordered pairs represents a function? \{(-5, -4), (3, 4), (7, -6), (7, 1)\}{(−5,−4),(3,4),(7,−6),(7,1)} \{(8, -2), (6, 8), (6, 3), (-4, -2)\}{(8,−2),(6,8),(6,3),(−4,−2)} \{(7, 5), (7, -9), (-2, -3), (4, -1)\}{(7,5),(7,−9),(−2,−3),(4,−1)} \{(-8, -7), (0, -7), (-4, 0), (4, -5)\}{(−8,−7),(0,−7),(−4,0),(4,−5)}