4Parallel and Perpendicular Lines Chapter 6: Section 5Parallel and Perpendicular Lines
5Parallel Lines Lines in the same plane that never intersect Nonvertical lines are parallel if they have the same slope and different y-intercepts.Any two vertical lines are parallel.
6Example 1Check to see if the equations are parallel.
7Example 2Write and equation for the line that contains (5, 1) and is parallel topointm, slope
8Perpendicular Lines Lines that intersect to form right angles Two lines are perpendicular if their slopes are negative reciprocals. Their product is -1.Vertical and horizontal lines are perpendicular.
9Example 3Check to see if the equations are perpendicular.
10Example 4Write and equation for the line that contains (0, -2) and is perpendicular topointm, slope
11Your AssignmentPage 314#’s 4-40 multiples of 4#31#42