Parallel & Perpendicular Lines

Parallel or Perpendicular?

Example 5

Determine whether the lines are parallel, perpendicular or neither. Line 1: p_ex5-1Line 2 : p_ex5-2

 

Step 1. Rewrite the equations in slope-intercept form and determine the slope of each.


p_ex5-3

Step 2. Compare the slopes.

The slopes are opposite reciprocals of each other,
so the lines are perpendicular to each other.