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Is this a function y equals x?

Updated: 9/17/2019
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Wiki User

11y ago

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Yes, y =5 is a constant function. Meaning that for any value of x (in the domain), the value of the function (y) is 5. The graph would be a horizontal line five units above, but parallel to, the x-axis. Another answer: The above comments are only valid if we specify that x is just some constant. In general, however, when we refer to the function y=f(x)=x we do not mean a constant function, but rather a diagonal line running through the origin. The function would be a constant function if it were y=f(x)=c for some c, but normally when we write y=x we mean that the value of y is the value of x, and hence y changes as x changes.

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14y ago
This answer is:
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12y ago

That is a function. x=y^2 is not a function.

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14y ago

Yes it is. It is a cubic function.

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