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.
In this lesson, students learn how to write equations of lines that are parallel or perpendicular to a given line, given a point on the line. The lesson uses the slope-point formula to solve for the equation of the line, and also provides some example problems for students to try on their own. Additionally, the lesson covers how to determine whether two lines are parallel, perpendicular, or neither, based on their slopes.
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