Graph not showing
I want to display a simple 3D graph using Grapher, namely
z=80+0.2x(1-0.1y)
but when I type this in no graph is shown.
It appears to work ok for 2D graphs, but I can't get the £D to work.
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Wolfram-Alpha has no issue with plotting this hyperbolic paraboloid, but I see no means in Grapher to produce it in 3-space.
You can even enter this equation in Spotlight. It will default to Wolfram Alpha, and when you press return, it displays the Wolfram-Alpha page for the plot, and then press return again, and it opens a web page with the above link and the 3D plot calculated.