Khan/khan-exercises — Issue #13669: Equation of a line - Equation of a Line Wrong with Slope = 0
Author: KhanBugz
Created: 2012-02-12 09:31:49+00:00
State: open
Labels: firefox, wrong-or-unclear, xp

Reporter: t.rybner@gmail.com

Problem: A line passes through both (3,−2) and (−2,−2). Express the equation of the line in point slope form.

The only accepted answers are:
(y − −2) = 0 (x − 3) and
(y − −2) = 0 (x − −2)

It should rightfully be:
(y − −2) = 0 ( x − Whatever)
as 0 times (x - Whatever) is just as much zero as 0 times (x - -2)

Thank you

[equation_of_a_line.html?seed=128&problem=two-points (point_slope_form)](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/equation_of_a_line.html?seed=128&problem=two-points&debug)

[Answer timeline](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/equation_of_a_line.html?seed=128&problem=two-points&debug&activity=%5B%5B%22incorrect-activity%22%2C%22%5B%5B%5C%22-2%5C%22%2C%5C%220%5C%22%2C%5C%22%5C%22%5D%5D%22%2C47%5D%2C%5B%22incorrect-activity%22%2C%22%5B%5B%5C%22-2%5C%22%2C%5C%220%5C%22%2C%5C%220%5C%22%5D%5D%22%2C6%5D%2C%5B%22incorrect-activity%22%2C%22%5B%5B%5C%222%5C%22%2C%5C%220%5C%22%2C%5C%220%5C%22%5D%5D%22%2C5%5D%2C%5B%22hint-activity%22%2C%220%22%2C16%5D%2C%5B%22hint-activity%22%2C%220%22%2C17%5D%2C%5B%22hint-activity%22%2C%220%22%2C19%5D%5D)

[[["-2","0",""]],[["-2","0","0"]],[["2","0","0"]]]

Mozilla/5.0 (Windows NT 5.1; rv:10.0) Gecko/20100101 Firefox/10.0

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