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

Answer 1

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