which pair of equations represents perpendicular lines?
a){y=1/2x+2
{y=-1/2x+4
b){y=5x+7
{y=-1/5x+3
c){y=1/5x+2
{y=1/5x+1
d){y=3x+4
{6x+8

Question

which pair of equations represents perpendicular lines?
a){y=1/2x+2
   {y=-1/2x+4
b){y=5x+7
   {y=-1/5x+3
c){y=1/5x+2
   {y=1/5x+1
d){y=3x+4
   {6x+8

anonymous · Answer

what do u think

welshfella · Answer

which numbers in the equations give you the slope?

trojanpoem · Answer

The answer is (B).
If two lines are perpendicular. The result of multiplying their slopes = -1

Check each case separately:
A:  m=  0.5 , -0.5    multiplication: -0.25  (refused)
B:  m = 5 , -1/5       multiplication: -1   (our answer)