# How do you graph y=sqrt(-x) and how does it compare to the parent function?

Dec 24, 2016

See the graph and the explanation.

#### Explanation:

The parent equation ${y}^{2} = - x \ge 0$, that represents a parabola, is

the combined equation for the pair

$y = \sqrt{- x} , y \ge 0$ and

$y = - \sqrt{- x} , , y \le 0$

representing the semi parabolas, in ${Q}_{2} a \cap d {Q}_{3}$, respectively.

graph{y-sqrt(-x)=0 [-10, 10, -5, 5]}