1. 
passes through points (?, 2) and (3, 9)


2. 
A line with a slope of   13 
passes through points (2, ?) and (1, 9)


3. 
passes through points (9, 2) and (0, ?)


4. 
passes through points (9, 6) and (?, 3)


5. 
passes through points (1, 1) and (2, ?)


6. 
passes through points (0, 4) and (?, 5)


7. 
passes through points (?, 7) and (5, 2)


8. 
passes through points (7, ?) and (6, 3)


9. 
passes through points (6, ?) and (3, 8)


10. 
passes through points (?, 7) and (0, 0)


11. 
passes through points (11, 3) and (1, ?)


12. 
passes through points (12, 10) and (?, 16)


13. 
passes through points (?, 0) and (3, 17)


14. 
A line with a slope of   33 
passes through points (8, 18) and (9, ?)


15. 
A line with a slope of   1 
passes through points (15, ?) and (13, 4)


16. 
A line with a slope of   3 
passes through points (8, 1) and (?, 2)


17. 
passes through points (52, ?) and (23, 1)


18. 
passes through points (28, 14) and (?, 36)

