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Help with functions question on math homework (file attatched)

Help with functions question on math homework (file attatched)-example-1

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By using the vertical line test, you can determine if anything graphed is a function.

Take a straight edge and draw vertical lines going through the line. If the vertical line touches the line more than once, it is not a function.

If you do this test correctly, you should find out that the answer is D.

You might think that A could be an answer, but don't be fooled. Option A is undefined.

User Bocajim
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