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Which of the following graphs is NOT a function?

Which of the following graphs is NOT a function?-example-1
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User Odette
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Answer:

Explanation:

The ellipse (the top one). Check out the y axis. It hits the ellipse in two places when x = 0

That makes it a non function.

Definition: a function has only 1 y value associated with a corresponding x value.

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User Sinan Erdem
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