# True or False? #4

Algebra Level 5

Which of these followings are true?

A. The graph of $$xy=0$$ is a union of the $$x$$-axis and the $$y$$-axis.

B. If the graph of $$x^2+y^2=r$$ appears on the Cartesian coordinates system, then $$r>0.$$

C. The graph of $$|y|=\sqrt{-2x^2+3xy}$$ and $$x = c$$ intersects at two points for all real values $$c\neq 0$$.

This problem is a part of <True or False?> series.

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