Parallel & Perpendicular Lines
Parallel or Perpendicular?
Example 5
Determine whether the lines are parallel, perpendicular or neither. Line 1: 
Line 2 : 
Step 1. Rewrite the equations in slope-intercept form and determine the slope of each.
Step 2. Compare the slopes.
The slopes are opposite reciprocals of each other,
so the lines are perpendicular to each other.