Is the graph of y = square root of x a parabola? Why or why not?
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Well, what is x expressed through y?
Emakarov's suggestion does not quite answer that question. If you solve for x, $\displaystyle x= y^2$ which is a parabola. But the graph of $\displaystyle y= \sqrt{x}$ is NOT a parabola. It is only half a parabola.
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