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.
graph z = 2x +x*y + x*y^2 + x*y^3 + x*y^4, 0.5<=y<=1, 10<=x<=20
Natural Language
Math Input
Extended Keyboard
Examples
Upload
Random