Name _____________________________ Date ___________________
Coordinate Geometry
Determine whether the line AB is parallel to line CD, perpendicular to line CD, or neither.

 1 Line AB: (8, 5) and (-6, -3)Line CD: (3, -5) and (-29, 51)
 2 Line AB: (0, -7) and (2, 5)Line CD: (-2, 7) and (0, -2)
 3 Line AB: (0, 6) and (2, -2)Line CD: (-9, -3) and (-7, -11)
 4 Line AB: (-4, -1) and (7, -8)Line CD: (8, 9) and (-13, 42)
 5 Line AB: (1, -3) and (-7, -2)Line CD: (-1, 5) and (2, -19)
 6 Line AB: (6, 5) and (5, 1)Line CD: (4, -1) and (-12, 3)
 7 Line AB: (9, -7) and (16, 0)Line CD: (6, 7) and (8, 6)
 8 Line AB: (9, -7) and (1, -8)Line CD: (11, -5) and (3, -6)
 9 Line AB: (-8, -9) and (8, 0)Line CD: (-9, -1) and (6, -2)
 10 Line AB: (-2, -5) and (-3, 0)Line CD: (-1, -6) and (-21, -2)
 11 Line AB: (-9, 11) and (7, 2)Line CD: (5, 18) and (41, 82)
 12 Line AB: (-3, 12) and (-14, -9)Line CD: (-7, 8) and (-18, -13)
 13 Line AB: (-12, -18) and (-10, 0)Line CD: (-8, 17) and (-18, -17)
 14 Line AB: (18, -3) and (0, 8)Line CD: (5, -14) and (60, 76)
 15 Line AB: (9, 12) and (-5, 13)Line CD: (20, 23) and (6, 24)
 16 Line AB: (4, -7) and (8, 4)Line CD: (-15, -15) and (-26, -19)
 17 Line AB: (-68, 11) and (98, 27)Line CD: (12, 91) and (178, 107)
 18 Line AB: (-55, -98) and (-64, 62)Line CD: (-86, 83) and (-99, 59)