Khan/khan-exercises — Issue #14626: Algebra challenge - the given answers are not the only possible
Author: KhanBugz
Created: 2012-02-24 22:33:52+00:00
State: open
Labels: chrome, wrong-or-unclear, xp

Reporter: pshenoff@gmail.com

In the previous problem about y-y1=m(x-x1) equation you can find m exactly (1/3), but x1 and y1 can be not only (4,4) or (2,-2), but basically any point on this line, for example, (3,1). Therefore, equation (y-3)= 1/3*(x-1) also an answer, but it wasn't an option. Thanks

[algebra_challenge.html?seed=43&problem=42 (expressions_with_unknown_variables_2)](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/algebra_challenge.html?seed=43&problem=42&debug)

[Answer timeline](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/algebra_challenge.html?seed=43&problem=42&debug&activity=%5B%5D)

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Mozilla/5.0 (Windows NT 5.1) AppleWebKit/535.11 (KHTML, like Gecko) Chrome/17.0.963.56 Safari/535.11

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