Line BC contains points B (4, −5) and C (3, 2). Line DE contains points D (2, 0) and E (9, 1). Lines BC and DE are

parallel

perpendicular

neither

Question

Line BC contains points B (4, −5) and C (3, 2). Line DE contains points D (2, 0) and E (9, 1). Lines BC and DE are

parallel

perpendicular

neither

triciaal · Answer

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this is an approximation
definitely not parallel
perpendicular lines the product of the slopes =-1
slope = change in y/change in x
slope of bc   2-(-5)/3-4 = -7
slope of de 1-0/9-2 = 1/7
product of slopes  -7*1/7 =-1

lines are perpendicular