9. Which of the following functions has a graph of parallel lines?
(A) g(x) = ½x-4 and h(x) = -2x + 2
(B) f(x) = 3x + 3 and j(x) = 3x-6
(C) g(x) = ½x-4 and f(x) = 2x + 3
(D) j(x) = 2x-6 and h(x) = - 2x + 2
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