Khan/khan-exercises — Issue #13934: Point slope form - Problem doesn't accept arbitrary point on line
Author: KhanBugz
Created: 2012-02-15 23:00:46+00:00
State: open
Labels: firefox, wrong-or-unclear

I was given two points and asked to express the line through them in point-intercept form. The line had y-intercept -2 and slope zero, so I answered (y - (-2)) = 0(x - 0), even though neither of the points given had x-coordinate zero -- my answer seems to me to be a perfectly valid point slope form for this line. I think the problem should accept any point that passes through the line, rather than only the points in the problem statement.

[point_slope_form.html?seed=151&problem=two-points](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/point_slope_form.html?seed=151&problem=two-points&debug)

[Answer timeline](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/point_slope_form.html?seed=151&problem=two-points&debug&activity=%5B%5D)

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