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Which explains why the graph is not a function

Which explains why the graph is not a function-example-1
User MahMoos
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6 votes
The correct answer is D!
User Mjspier
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The correct answer is D.

By definition, a function cannot have more than 1 y value per x value. This relations breaks that rule since the x value of 4 has two different y values, 4 and -2.

Hope that makes sense!
User Fnord
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