# Which function is like the cubic function rotated 90 degrees?

I need something like the cubic function $y=x^3$ rotated 90 degrees. Which function is that?

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## 1 Answer

$y=-\root3\of x$

${}{}{}{}{}{}{}$

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But x cannot be negative using this function. Are there other ways? –  Linksku Jan 30 '12 at 2:18
@Linksku: yes it can. –  Qiaochu Yuan Jan 30 '12 at 2:28
I'm not very good at functions. According to the following link, if x is negative, then it curves downwards: wolframalpha.com/input/?i=plot+y%3D-x%5E%281%2F3%29 Am I missing something? –  Linksku Jan 30 '12 at 2:43
Try this. (Wolframalpha only seems to know the complex variant of the cube root.) –  Myself Jan 30 '12 at 2:46