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On a coordinate plane, solid circles appear at the following points: (negative 2, negative 5), (negative 1, 3), (1, negative 2), (3, 0), (4, negative 2), (4, 4). Which explains why the graph is not a function?
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On a coordinate plane, solid circles appear at the following points: (negative 2, negative 5), (negative 1, 3), (1, negative 2), (3, 0), (4, negative 2), (4, 4).

Which explains why the graph is not a function?

User BobbyP
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1 Answer

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27 votes
The input value of 4 results in two outputs - 4 and -2. Since the same input results on more than one output, the relation cannot be a function.
User Aron Rotteveel
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