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Which of the following pairs of equations represents lines that are perpendicular? 

A y = 3x + 2 and y = -3x + 2

B y = 2x + 5 and y = 8 - ½ x

C y = 4x + 1 and y = ¼ x + 1

D 4y = 2x + 4 and 2y = x + 6​