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Is y equals x2 a function?

Updated: 12/20/2022
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13y ago

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Y=X^2 is a function for it forms a parabola on a graph.

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13y ago
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Q: Is y equals x2 a function?
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Is y equals x2 plus 1 a function?

Yes. Think of y as being a function of x. y = f(x) = x2 + 1


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No, because there is more than one solution: y2 = x2 y = ±(x2)1/2 y = ±x Because there are multiple solutions for a single value of x, this does not qualify as a function.


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x = -3y = -14


What is the implicit form and explicit of the function x2 plus 2y equals 5?

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The "root" of a function is also called the "zero" of a function. This is where the function equals zero. The function y=4-x2 has roots at x=2 and x=-2 The function y=4-x2 has zeroes at x=2 and x=-2 Those are equivalent statements.