Khan/khan-exercises — Issue #6746: Parabola intuition 3 - Focus coordinates incorrect
Author: KhanBugz
Created: 2011-11-20 17:21:30+00:00
State: open
Labels: chrome, wrong-or-unclear

If I move the focus to (1/2, 0), the answer says the focus is at (1, 0). Moving the focus left or right gives a value of (3/8, 0) or (5/8, 0).

[parabola_intuition_3.html?seed=163&problem=0](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/parabola_intuition_3.html?seed=163&problem=0&debug)

[Answer timeline](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/parabola_intuition_3.html?seed=163&problem=0&debug&activity=%5B%5B%22hint-activity%22%2C%220%22%2C116%5D%2C%5B%22hint-activity%22%2C%220%22%2C121%5D%5D)

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Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/535.2 (KHTML, like Gecko) Chrome/15.0.874.120 Safari/535.2

MathJax is loaded, ready, queue length: 0