domain and range

**absvalue** · September 19th 2009, 09:37 AM

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. $(-\infty,\infty)$

**e^(i*pi)** · September 19th 2009, 10:18 AM

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

**skeeter** · September 19th 2009, 10:27 AM

graph ...

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