Khan/khan-exercises — Issue #10484: Parabola intuition 3 - YOU CAN'T CHANGE THE - SIGN AFTER THE Y AND X!
Author: KhanBugz
Created: 2012-01-06 00:23:33+00:00
State: open
Labels: firefox, snowleo, wrong-or-unclear

Reporter: ashilol95@gmail.com

the hints says the answer is y+3/8=−1/4(x+1/8)squared but you can't change the - sign after y and x. I typed in y-(-3/8)=-1/4(x-(-1/8)) but it said it was wrong.

[parabola_intuition_3.html?seed=17&problem=0](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/parabola_intuition_3.html?seed=17&problem=0&debug)

[Answer timeline](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/parabola_intuition_3.html?seed=17&problem=0&debug&activity=%5B%5B%22incorrect-activity%22%2C%22%5B%5C%22-3%2F4%5C%22%2C%5C%22-1%2F4%5C%22%2C%5C%22-1%2F8%5C%22%2C%5C%22-0.125%5C%22%2C%5C%22-1.375%5C%22%2C%5C%220.625%5C%22%5D%22%2C69%5D%2C%5B%22incorrect-activity%22%2C%22%5B%5C%22-3%2F4%5C%22%2C%5C%22-1%2F4%5C%22%2C%5C%22-1%2F8%5C%22%2C%5C%22-0.125%5C%22%2C%5C%22-1.375%5C%22%2C%5C%220.625%5C%22%5D%22%2C2%5D%2C%5B%22hint-activity%22%2C%220%22%2C4%5D%2C%5B%22hint-activity%22%2C%220%22%2C4%5D%2C%5B%22hint-activity%22%2C%220%22%2C5%5D%2C%5B%22hint-activity%22%2C%220%22%2C5%5D%2C%5B%22hint-activity%22%2C%220%22%2C5%5D%2C%5B%22hint-activity%22%2C%220%22%2C5%5D%2C%5B%22hint-activity%22%2C%220%22%2C5%5D%2C%5B%22hint-activity%22%2C%220%22%2C6%5D%5D)

[["-3/4","-1/4","-1/8","-0.125","-1.375","0.625"],["-3/4","-1/4","-1/8","-0.125","-1.375","0.625"]]

Mozilla/5.0 (Macintosh; Intel Mac OS X 10.6; rv:2.0.1) Gecko/20100101 Firefox/4.0.1

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