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.
fit quadratic {13, 178} {15, 209} {16, 226} {17, 243} {18, 262} {19, 281} {20, 301}
Natural Language
Math Input
Extended Keyboard
Examples
Upload
Random