Question

PlEaSe HeLp
Tell whether the lines for each pair of equations are parallel, perpendicular or neither.

1)
y=-2x+4 and -5x+10y=5

2)
y=(-1/4)x+8 and -2x+8y=4

Thanks so much!

Answer 1

How do you know when a set of lines are parallel, or perpendicular?

Answer 2

y=-2x+4 and y = 1/2x+1/2
y=(-1/4)x+8 and y= 1/4x+1/2
parallel has the same slope
perpendicular has a slope that is a reciprocal with the opposite sign

Answer 3

in this case, which one is has the same slope, or reciprocal with opposite sign or neither