Question

Math. Help with number 7

Answer 1

It is not a function, it does not pass the vertical line test. The x values have multiple outputs. For example, 5 has an output of 5 and of 10. Therefore it can't be considered a function.

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Answer 2

If any of your x's repeat (aka 5) then it is not a function. Because in order to be a function you cannot have any of the x's repeat or an x value has more than 1 y value.
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