Determine whether the following two lines are parallel, perpendicular or neither. y = 4x + 5 and 2x + 8y = 16

Answer 1

write them both as y= mx + b

compare the m. IF same then parallel, if negative inverses, then perpendicular

if neither, then not parallel or perpendicular

2x+8y=16 is the same as

8y = -2x +16 or

y = -(1/4)x + 2

-(1/4) is the negative inverse of 4, so the lines are perpendicular