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[seul-edu] graphing software

To all,
    A few weeks ago I asked about graphing software that might be useful in a high school Algebra 1 class. If anybody else is ever looking for the same thing, one of the answers is right under our noses.  
    After much experimentation, I finally figured out how to use gnuplot. The documentation is horrible for an inexperienced user, but the capabilities are excellent. Once you figure how to set the scaling, grid, and range, it's a great free program to graph multiple simultaneous equations.
Dave Prentice