Problema Solution
Show that the line (-4,6),(4,2) is perpendicular to line (0,0) and (3,6).
Answer provided by our tutors
for two lines to become perpendicular their slopes should be -ve reciprocal of each other
2-6/4+4 =6-0/3-0
-4/8 =6/3
-1/2 =2
so the lines are perpendicular