Which set of ordered pairs represents a function? A{(0,1), (1, -1),(1,2), (2,1),(-1,3)}
B {(-1,1),(0, -1),(1, 1), (2; -11),(3,3)}
© {(1, -2), (1, -1),(1,0),(1, 2), (1,3)}
D {(0,1),(-1, -1), (2,5),(-3,1),(-1,7)}

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