Question: How to plot an ellipse?

Hello everyone!

I used Maple 17 to fit an ellipse to a set of points using the following guide:

My rotated ellipse was calculated to be:


0.3939708949 x^2 - 0.005975799853 + 0.6345432059 y^2

But everytime I try to graph it in Maple 17, it only shows the axes and nothing else. Any help would be extremely appreciated.

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