Directions: Solve each system by graphing. Determine if the system is consistent or inconsistent.

1. x + y = 3 and x - y = 0

2. 3x + 2y = 5 and 6x + 4y = -3

3. x + y = 3 and x + y = -2

4. x - y =0 and 2x - y = 0 (0, 0)

5. x + 2y = 0 and x + y = 1 (2, -1)

6. x - 4y = 9 and 2x - 3y = 8 (1, -2)

7. 3x + 9y = 9 and 2x - 3y = 6 (3, 0)

8. x + y = 2 and x - y = 0 (1, 1 )

9. x + y = 1 and x - y = -3 (-1, 2)

10. 2x + y =2 and x -2y = -4 (0, 2)

11. 2x + 3y = 3 and 4x + 6y = -12

12. 3x -2y = -1 and 2x - 4y = 2

13. y = -1 and x = -2

14. x - y = 1 and y = 2

15. 3x + 3y = 21 and 3x + 4y = 24

16. 3x + 2y = 5 and 9x + 6y = 12

17. 2x + y = -6 and x = -3

18. 4x + 9y = 13 and y = x