Khan/khan-exercises — Issue #13267: Converting between slope intercept and standard form - doesn't recognize an equivalent answer
Author: KhanBugz
Created: 2012-02-07 17:07:39+00:00
State: open
Labels: chrome, snowleo, wrong-or-unclear

Reporter: lostnoise1@gmail.net

put y=3x+1 in standard form(ax+by=c).
I answer a=-3,b=1,c=1.
I'm told that's wrong, so I answer:
a=3,b=-1,c=-1 and am told this is right. They are equivalent answers and both should be right.

[converting_between_slope_intercept_and_standard_form.html?seed=118&problem=slope-to-standard](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/converting_between_slope_intercept_and_standard_form.html?seed=118&problem=slope-to-standard&debug)

[Answer timeline](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/converting_between_slope_intercept_and_standard_form.html?seed=118&problem=slope-to-standard&debug&activity=%5B%5B%22incorrect-activity%22%2C%22%5B%5B%5C%22-3%5C%22%2C%5C%221%5C%22%2C%5C%221%5C%22%5D%5D%22%2C7%5D%2C%5B%22correct-activity%22%2C%22%5B%5B%5C%223%5C%22%2C%5C%22-1%5C%22%2C%5C%22-1%5C%22%5D%5D%22%2C27%5D%5D)

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

Mozilla/5.0 (Macintosh; Intel Mac OS X 10_6_8) AppleWebKit/535.7 (KHTML, like Gecko) Chrome/16.0.912.77 Safari/535.7

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