If the line y = 3x + m passes through the first, third and fourth quadrants, then the vertex of the parabola y = (x-m) 2 + 1 must be at () A. First quadrant B. second quadrant C. third quadrant D. fourth quadrant

∵ the vertex (m, 1) of the straight line y = 3x + m passing through the first, third and fourth quadrants, ∵ m < 0, ∵ parabolic y = (x-m) 2 + 1 must be in the second quadrant

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