In the xy-coordinate system, line k passes through points (-5m, 0) and (0, 2m). Which of the following is a possible equation of line k?
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A$$y=-\frac{5}{2}x+2m$$
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B$$y=\frac{2}{5}x-5m$$
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C$$y=\frac{5}{2}x+2m$$
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D$$y=\frac{2}{5}x+2m$$
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E$$y=-\frac{2}{5}x-5m$$
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正确答案: D