Mathematics, 14.05.2021 09:50, ap319773

Which relation is a function {(2, 3), (1,5), (2,7)}
{(-1,5), (-2,6), (-3,7)}
{(11,9), (11,5), (9,3)}
{(3,8), (0,8), (3,-2)}

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Which relation is a function {(2, 3), (1,5), (2,7)}
{(-1,5), (-2,6), (-3,7)}
{(11,9), (...