Problema Solution
Show that the line (2,2),(-7,-4) is perpendicular to (-5,3)(1,-6).
Answer provided by our tutors
for 2 lines to becom eperpendicular their slopes should be -ve reciprocal of each other
-4-2/-7-2 = -6-3/1+5
-6/-9 =-9/6
6/9= -9/6
so lines are perpendicular