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X^2 + y^2 = 4 determine whether or not the equation represents y as a function of x...please help me
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X^2 + y^2 = 4

determine whether or not the equation represents y as a function of x...please help me

User Gaurav Bishnoi
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No because I'm pretty sure that equation creates a circle which doesn't pass the vertical or horizontal line test
User Huge
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