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maths xyz plane question

how do I plot on a xyz plane the coordinates A(4,4,1), B(2,−2,0) and C(6,3,7) . I understand how to plot x and y values obviously. But how do I plot the z value
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You'll need to draw a "3D" picture.
That said, why do you need to plot it? Depending on the question itself, since three points will always lie on some plane, treating it like a 2D problem would suffice.
As an aside, I've just discovered that GeoGebra has 3D plots with "projection for glasses", so I'm ordering some red/blue glasses and going to give it a try.

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