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In the xy-plane, what is the slope of the line containing the two points with coordinates (7a, -10a) and (-13a, -4a), where a≠0?
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A.$$\frac{10}{3}$$
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B.$$\frac{7}{10}$$
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C.$$-\frac{3}{10}$$
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D.$$-\frac{3a}{10}$$
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E.$$-\frac{10a}{3}$$
C显示答案
