In the classroom, one of the most exciting features is it's interactive 3D plots.

- Start up the Sage server in VirtualBox, and open your browser to 127.0.0.1:8080 (or localhost:8000, depending on how your installation is set up).
- Click on the link, New Worksheet and give your new sheet a name (e.g. 3D plot).
- Click the button "typeset" to make your equations look neat and professional.
- In the first box, type in the command:

*var('x,y')*

and type SHIFT-Enter to evaluate the command. This sets up Sage to recognize x's and y's as symbolic variables in the lines below. - In the next box, type in the command:

*plot3d(x*y^3,(x,-2,2),(y,-2,2))*

and SHIFT-Enter. This will generate an interactive 3d plot of the function xy^3, from x = -2 to 2, and y = -2 to 2. You can click and drag on the box to rotate the graph.

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