Which pair of equations below represents two lines that are perpendicula
Select one:
O a. y=3x-2 and y = (-1/3)x+4
O b. y = (1/6)x-2 and y = 6x + 7
O c. y=3x+4 and y = 2x +4
O d. y=3x-2 and y = 3x + 4


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