Khan/khan-exercises — pull request #10769 by rhc2104 (2012-01-09 19:54:44+00:00)
Title: Converting between point slope and standard form

Trello task: https://trello.com/card/board/converting-between-point-slope-and-standard-form/4d87e664967a0775082939ab/4ec1860b14720a6bbe611f28

Finish off the progress from this pull request: https://github.com/Khan/khan-exercises/pull/6756

Related video: http://www.khanacademy.org/video/point-slope-and-standard-form?playlist=Algebra+I+Worked+Examples