IKMC 2011 - Grades 11-12 - Paper 02 - Self-study Question 14

How many of the graphs $y=x^2$, $y=-x^2$, $y=\sqrt x$, $y=-\sqrt x$, $y=\sqrt{-x}$, $y=-\sqrt{-x}$, $y=\sqrt{|x|}$, $y=-\sqrt{|x|}$ are included in the figure?