Mathematics, 20.02.2021 08:40 rclara34oxbrr9

A friend says that $\sqrt{x} =y$ is not an example of a function because if x=16, then y=-4 and 4. Explain whether this reasoning is always correct.

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A friend says that is not an example of a function because if x=16, then y=-4 and 4. Explain whether this reasoning is always correct.

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Another question on Mathematics

A friend says that $\sqrt{x} =y$ is not an example of a function because if x=16, then y=-4 and 4. Explain whether this reasoning is always correct.