17.	+Determine+if+lines+are+parallel+or+perpendicular+on+the+coordinate+plane

= Determine if lines are parallel or perpendicular on the coordinate plane = = Summary:** Parallel lines consist of 2 lines or segments that will never intersect. Both lines will have the same slopes. Perpendicular lines are two lines or segments that intersect and form 90 degree angles. Their slopes will be different and are opposite reciprocals. **=

**Examples:**
1. Find an equation of a line parallel to the given line and passing through the given point. Y=1/2x-10; (10,2) 2=1/2(10)+b -3=b y=1/2x-3

=2. Write an equation for the line that is perpendicular to the given line and passes through the given point.= =Y=2x-3; (8,1)= =1=2(8)-b= =-15=b= =y=-2x-15=

3. Determine whether the two lines given are parallel, perpendicular, or neither 6x+2y=24 and y=-3x+3 2y=-6x+24 y=-3x+12

__Links__: http://www.mathopenref.com/coordperpendicular.html http://library.thinkquest.org/20991/geo/parallel.html http://www.onlinemathlearning.com/coordinate-geometry.html