An epic scratch project : "Graphs"
http://scratch.mit.edu/projects/roijac/1864583
Project notes:
This project is, (as far that I know) the first project doing this in the history of Scratch. I think Xenon want to do something similar.
This Project draws graphs. If you know how to use trigonometry, you could create nice graphs
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You can write terms to the computers and it will render the graph. It currently only supports +,-,*,/,(,),cos(),sin(),Y and X, but you can create pretty nice graphs with it.
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