Given the points A (1, 2), B (-4, 4), C (-3, -3) and D (2, -5), determine ifLINE:AB and LINE:CD are parallel, perpendicular or neither.
A.
parallel
B. both perpendicular and parallel
C.
perpendicular
D. neither
MyANSWER: A
slope AB=(2-4)/(1+4)=2/5
SLOPE cD= (-3+5)/(-3-2)=3/-5
NOT PARALLEL, NOT PERPENDICULAR
CHECK MY CALCULATIONS