At 8:20 of the video, there is an error: line #3 should be y = -3/2x - 6 because you need to find the opposite reciprocal.
Covers writing equations of lines parallel or perpendicular to a given line if you know a point on the line. This is part 24 of a series of videos about graphing lines.
More free YouTube videos by Julie Harland are organized at http://yourmathgal.com