1. Slope of AB: 2, Slope of CD: 2
2. Slope of AB: -1/2, Slope of CD: -1/2
3. Slope of AB: -1/3, Slope of CD: -1/3
4. Slope of AB: -1/2
5. Slope of CD: 2
6. Equation of AB: y = -1/2x - 1
7. Equation of CD: y = 2x
8. AB and CD are perpendicular.
9. Slope of EF: -1/2
10. Equation of EF: y = -1/2x - 1
11. Equation of GH: y = -1/2x - 3
12. Parallel lines have the same slope.
13. Slope of AB: 2, Slope of CD: -1/2
14. Slope of AB: -1, Slope of CD: 1
15. Slope of AB: 1, Slope of CD: -1
16. Slope of AB: 2
17. Equation of AB: y = 2x + 9
18. Equation of CD: y = -1/2x - 2
19. The slopes of perpendicular lines are negative reciprocals.
20. Slope of a horizontal line: 0
21. Equation of AB: y = 3
22. Equation of EF: y = -3
23. Slope of a vertical line: undefined
24. Equation of CD: x = 1
25. Equation of GH: x = 4
Parent Tip: Review the logic above to help your child master the concept of graphing parallel and perpendicular lines worksheet.