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.
InterpolatingPolynomial[{{0,0},{19,1},{30,2},{39,3},{45,4}},x]
Natural Language
Math Input
Extended Keyboard
Examples
Upload
Random