Khan/khan-exercises — pull request #42206 by Helpsypoo (2013-03-06 06:55:00+00:00)
Title: Added problem types to some linear equation and inequality exercises.

A few response types are specified in the common core standards that aren't present in the current body of exercises. These changes fill a few holes, specifically:

Multiple choice problems were added to several linear equations exercises.
Problems requiring students to graph inequalities were added.