Khan/khan-exercises — Issue #11062: Point slope form - Calculations of y(1)-y(2) and x(1)-x(2) are incorrect
Author: KhanBugz
Created: 2012-01-12 20:51:30+00:00
State: open
Labels: firefox, win7, wrong-or-unclear

Reporter: hanging.wednesday@gmail.com

The solution guide says that -1-(-3) is +1

It also says that -1 - +5 is 3.

[point_slope_form.html?seed=171&problem=two-points](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/point_slope_form.html?seed=171&problem=two-points&debug)

[Answer timeline](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/point_slope_form.html?seed=171&problem=two-points&debug&activity=%5B%5B%22incorrect-activity%22%2C%22%5B%5B%5C%22-3%5C%22%2C%5C%22-1%2F2%5C%22%2C%5C%225%5C%22%5D%5D%22%2C48%5D%2C%5B%22hint-activity%22%2C%220%22%2C2%5D%2C%5B%22hint-activity%22%2C%220%22%2C2%5D%2C%5B%22hint-activity%22%2C%220%22%2C3%5D%5D)

[[["-3","-1/2","5"]]]

Mozilla/5.0 (Windows NT 6.1; WOW64; rv:9.0.1) Gecko/20100101 Firefox/9.0.1

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