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 (i) through (0,0) and (2,3) is parallel to the line through (2,2) and (4,5) (ii) through (-2,6) and (4,8) is perpendicular to the line through (8,12) and (4,24) (iii) through (2,-3) and (-1,2) is perpendicular to the line joining (3,7) and (-2,4) .

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

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 (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 through (2, -5) and (-2, 5) is perpendicular to the line through (6, 3) and (1, 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 (2, -3) and (-5, 1) is : Perpendicular to the line joining (4, 5) and (0, -2)

Show that the line through points (4,7,8) and 2,3,4 ) is parallel to the line through the points (-1,-2,1) and (1,2,5) .

Show that the line through the point (4, 7, 8) and (2, 3, 4) is parallel to the line through the points (-1, -2, 1) and (1, 2, 5).