2. 外语
  3. In the rectangular coordinate system, line k passes through the points (0, 0) and (4,8); line m passes through the points (0,1)

In the rectangular coordinate system, line k passes through the points (0, 0) and (4,8); line m passes through the points (0,1)

admin2009-05-19  23
问题 In the rectangular coordinate system, line k passes through the points (0, 0) and (4,8); line m passes through the points (0,1) and (4,9).

Column A                       Column B
The slope of line k            The slope of line m
选项 A、if the quantity in Column A is greater
B、if the quantity in Column B is greater
C、if the two quantity are equal
D、if the relationship cannot be determined from the information given
答案C
解析 在一个平面直角坐标系中，直线忌通过(0，0)和(4，8)两点，直线m通过(0，1)和(4，9)两点。
解：本题的正确答案为(C)。Slope=(y1-y2)/(x1-x2), so, Slope(k)=(8-0)/(4-0)=2; Slope(m)=(9-1)/(4-0)=2
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