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.
过 (1, 2) 和 (4, 8) 的直线方程。
过 (1, 2) 和 (4, 8) 的直线方程。
Natural Language
Math Input
Extended Keyboard
