Question 42133
NOT PERPENDICULAR BECAUSE THE SLOPE OF THE LINE THROUGH (2,3) & (11,6)IS 
(6-3)/(11-2) OR 3/9 OR 1/3 AND THE LINE THROUGH (2,3) & (-2,18) IS 
(18-3)/(-2-2) OR 15/-4 WHICH IS NOT THE NEGATIVE INVERSE OF 1/3 THEREFORE THE LINES ARE NOT PERPENDICULAR.