Khan/khan-exercises — Issue #5145: Parabola intuition 2 - Nice to see the Equation
Author: KhanBugz
Created: 2011-10-28 19:22:13+00:00
State: open
Labels: ie8, xp

Reporter: rhoadess@yahoo.com

What might be nice is to also see the equation in standard form

y-y1=A(x-x1)
where
A = 1/2(b-k);
y1=(k+b)/2;
x1=a;
k=directrix
(a,b)=focus

[parabola_intuition_2.html?seed=177&problem=0](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/parabola_intuition_2.html?seed=177&problem=0&debug)

[["1","3","-3"]]

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