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Comment on Eigenvectors and eigenvalues explained visually

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The graphics is nice but the explanation is just terrible. There is a huge gap between the first part explaining vectors and then the part explaining eigenvectors.

"If you can draw a line through (0,0), v and Av, then Av is just v multiplied by a number λ; that is, Av=λv."

That makes no sense. How do you draw a line through a point to "v and Av"? What does "v and Av" even mean in that context?

If you can draw a line through the three points: (0,0), v, and Av

That assumption should have been stated in the explanation and the graphics need to reflect that constraint, right? Or am I still missing something here?

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