Name _____________________________________ Class _____________ Date ____________

Practice 3-6	Slopes of Parallel and Perpendicular Lines

Are the lines parallel, perpendicular, or neither? Explain.
1. 		2. 		3. 		4. 
						
5. 	6. 		7. 		8. 
				
Are lines  and  parallel, perpendicular, or neither? Explain.
9.		10.					11.
12.		13.					14.
Write an equation for the line perpendicular to  that contains point Z.
15. 		16. 	     17. 
Write an equation for the line parallel to  that contains point Z.
18. 	19. 	     20. 
21. Aviation Two planes are flying side by side at the same altitude. It is important that their paths do not intersect. One plane is flying along the path given by the line . What is the slope-intercept form of the line that must be the path of another plane passing through the point  so that the planes do not collide? Graph the paths of the two planes.