Mathematics, 26.08.2019 20:30 dmc79765

Which function has an inverse that is also a function?
{(-1, -2), (0, 4), (1, 3), (5, 14), (7,4)}
{(-1, 2), (0, 4), (1,5), (5, 4), (7, 2)}
{(-1, 3), (0, 4), (1, 14), (5, 6), (7, 2)}
{(-1, 4), (0, 4), (1, 2), (5, 3), (7, 1)}

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Which function has an inverse that is also a function?
{(-1, -2), (0, 4), (1, 3), (5, 14), (7...