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Mathematics 10 Online
OpenStudy (anonymous):

how can something fail to be a function

OpenStudy (phi):

if it has more than 1 y value for a given x value for example f(x)= \( \pm \sqrt{x} \) is not a function , because it has two different answers for the same x, one + and the other -

OpenStudy (amtran_bus):

fails vert line test

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