Show that the line joining `(-1,1)` and `(-9,6)` are parallel to the line joining (-2,14) and (6,9).

Show that the line joining (2,-3) and (-5,1) is parallel to the line joining (7,-1) and (0,3).

Show that the line joining (2,-3) and (-5,1) is (i) parallel to the line joining (7,-1) and (0,3) (ii) perpendicular to the line joining (4,5) and (0,-2)

Show that the line joining (5, 6) and (2,3) is parallel to the line through (9, -2) and (6, -5) .

Show that the line joining (2, -3) and (-1, 2) is perpendicular to the line joining (3, 7) and (-2, 4) .

Show that the line joining the points (4,-1) and (-3,3) is parallel to the line joining the points (8,0) and (1,4) .

Show that the line joining (2, -3) and (-5, 1) is : Perpendicular to the line joining (4, 5) and (0, -2)

Show that the line joining the points (4,5) and (1,2) is parallel to the line joining the points (9,-2) and (12,1) .

Show that the joining (2,-5) and (-2,5) is perpendicular to the line joining (6,3) and (1,1) .

Show that the line joining the points A(4,8) and B(5,5) is parallel to the line joining the points C(2,4) and D(1,7).