- #1

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What about x=y^2 ??

It is one to one or nope??(I know what means one by one,but I am a bit confused,answering in my question,everything will be clear.)

Thanks!!!

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- Thread starter Hepic
- Start date

- #1

- 118

- 0

What about x=y^2 ??

It is one to one or nope??(I know what means one by one,but I am a bit confused,answering in my question,everything will be clear.)

Thanks!!!

- #2

Office_Shredder

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- #3

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I just ask if this function:y=x^2 is one to one.

- #4

mathman

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I just ask if this function:y=x^2 is one to one.

In your original entry you said you know it is not. What is your question? Simply moving letters around does not make it any clearer.

- #5

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Sorry,that was my wrong.

By the way both functions(y=x^2 and x=y^2) are one to one,or no?

By the way both functions(y=x^2 and x=y^2) are one to one,or no?

- #6

Mark44

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For x = y

If x is the dependent variable (i.e., x is a function of y), then the graph of x = y

If x is the independent variable, then the equation x = y

- #7

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This function is one by one?

- #8

HallsofIvy

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You have already been told, it is NOT a *function*.

- #9

Mark44

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The image you posted could be clearer if the two axes were labeled. From the graph and the equation, the vertical axis has to be the y-axis, and the horizontal axis has to be the x-axis.

This function is one by one?

The image shows a vertical red line, so wherever you got this was probably showing an example of using the vertical line test. What does your book (or wherever you got this image) say about a graph for which a vertical line intersects two or more points?

- #10

Mark44

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The question has been asked and answered, so I'm closing this thread.

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