Khan/khan-exercises — Issue #4417: Parabola intuition 3 - Parabola Intuition 3 - Directrix inaccuracy
Author: KhanBugz
Created: 2011-10-16 06:14:47+00:00
State: open
Labels: chrome, win7

Reporter: johnpulford@gmail.com

Couldn't specify Directrix = 1 (Closest was 1000/1001), upon using hints it told me that he directrix should be 1 but the orange bar automatically positioned itself to 1000/1001 when near one.

[parabola_intuition_3.html?seed=171&problem=0](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/parabola_intuition_3.html?seed=171&problem=0&debug)

[["500/1001","1/(2000/1001)","-1/8","-0.125","0","1"]]

Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/535.1 (KHTML, like Gecko) Chrome/14.0.835.202 Safari/535.1

MathJax is loaded, ready, queue length: 0