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27 votes
27 votes
Line A: y = 1/2x + 2

Line B: y = -1/2x + 7
Line C: y = 2x + 4
Line D: y = 1/2x + 5/4
Which lines are perpendicular?

1 Answer

20 votes
20 votes
B & C

When the multiplication of two slopes of two lines is equal to -1, they are perpendicular to each other.
-1/2*2=-1
Therefore line B & C are perpendicular.
User JRB
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