Question

Determine whether each relation is a function.
{(4, 2), (2, 3), (6, 1)}
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{(-3, -3), (-3, 4), (-2, 4)}
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{(-1, 0), (1, 0)}
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-2x + 4y = 0
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x^2 + y^2 = 8 OR x'squared' + y'squared' = 8
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x = -4
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no
yes