Khan/khan-exercises — pull request #11889 by Christi (2012-01-23 06:10:34+00:00)
Title: Random changes to Point Slope Form

Made a bunch of little changes:

Fixed acceptable list so it looks more like other exercises (made the types plural to deal with multiple entries)
Added the unreduced fraction to the hint (fixes issues like #11062)
Added parentheses when subtracting a negative number to make it look "pretty" ;-)

Tried to fix the accepted forms so it would only take what the previous acceptable answer format said, but didn't work... not sure what's up with that.