MCQ
Which pair of lines are perpendicular?
Unit-8 Geometry of Straight Lines
A
3x + 4y = 12 and 4x - 3y = 5
B
3x + 4y = 12 and 6x + 8y = 24
C
2x + 3y = 6 and 4x + 6y = 12
D
x + y = 2 and x + y = 4
Explanation
Their slopes are -3/4 and 4/3, and (-3/4) * (4/3) = -1.
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