2. y x y=x-2 y=x+2 Slopes are the same

3. y x y=2x-4 y=2x+1 Slopes are the same

4. Why is This line is parallel to the original ?

8. y x y= 2x+1 y= -1/2x+1 Slopes are NEGATIVE reciprocals

9. y x y= 3x+1 y= -1/3x+1 Slopes are NEGATIVE reciprocals

10. Find the equation of the line that is perpendicular to the original ?

11. Find the equation of the line that is perpendicular to the original ?

12. Find the equation of the line that is perpendicular to the original ?

13. #1 If lines are parallel Their slopes are equal #2 If lines are perpendicular Their slopes are Negative reciprocals