# Math Help - domain and range

1. ## domain and range

I'm asked to find the domain and range of this function:

$x = -|y|$

Since $|y| \geq 0$ then $-|y| \leq 0$. So, I think the range of this function be $(-\infty,0]$.

I'm not sure how to find the domain though. Would the domain just be all reals? e.g. $(-\infty,\infty)$

2. Originally Posted by absvalue
I'm asked to find the domain and range of this function:

$x = -|y|$

Since $|y| \geq 0$ then $-|y| \leq 0$. So, I think the range of this function be $(-\infty,0]$.

I'm not sure how to find the domain though. Would the domain just be all reals? e.g. $(-\infty,\infty)$
Looks right to me, any real value of y would produce real x

3. graph ...