How do you use the vertical line test to show $x - y^{2} = 0$ $x-y^2=0$ is a function?

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How do you use the vertical line test to show $x - y^{2} = 0$ $x-y^2=0$ is a function?

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Answer 1 · 2015-06-07T13:40:02

You can not use the vertical line test to show that $x - y^{2} = 0$ $x-y^2 = 0$ is a function because it is not a function

Graph for $x - y^{2} = 0$ $x-y^2=0$ :
graph{x-y^2=0 [-5.54, 14.46, -5.08, 4.92]}
For all $x > 0$ $x>0$ a vertical line crosses the line of the equation in two places and therefore the equation does not represent a function.

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How do you use the vertical line test to show $x - y^{2} = 0$ $x-y^2=0$ is a function?

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How do you use the vertical line test to show $x - y^{2} = 0$ $x-y^2=0$ is a function?