ParametricPlot3D { (-1-3t^2)( cos x) , ( -1-3t^2)( sin x),3t- t3} t=-1 to 1,x=0 to 2pi

Uh oh! Wolfram|Alpha doesn't run without JavaScript.

Please enable JavaScript. If you don't know how, you can find instructionshere.Once you've done that, refresh this page to start using Wolfram|Alpha.