Uh oh! Wolfram|Alpha doesn't run without JavaScript.
Please enable JavaScript. If you don't know how, you can find instructions
here
.
Once you've done that, refresh this page to start using Wolfram|Alpha.
cubic fit 20.9,23.2,26.2,26.4,16.3,-12.2,-60.6,-128.9
Natural Language
Math Input
Extended Keyboard
Examples
Upload
Random