Which of the following pairs of equations represents parallel lines?

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A. 2x + y = 4 and 4x + 2y = 8

B. x + 2y = 3 and 2x + 4y = 6

C. 3x - y = 5 and 3x + y = 1

D. x - y = 2 and 2x - 2y = 4

E. None of the above

Answer: A. 2x + y = 4 and 4x + 2y = 8

The slopes of the lines in option a are the same, indicating they are parallel.

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