The best thing about this is that it doesn't require me to download and install 1.8 gigabytes of life-sucking Mathematica demo-version just to get a graph that

The best thing about this is that it doesn't require me to download and install 1.8 gigabytes of life-sucking Mathematica demo-version just to get a graph that I can draw on a napkin in 4 or 5 seconds ..