A-A+
In a rectangular coordinate system line k has
问题详情
In a rectangular coordinate system, line k has x-intercept 4 and slope-2.
Column A Column B
The y-intercept of k 2
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请帮忙给出正确答案和分析，谢谢！
参考答案
正确答案：A
解析：在一个平面直角坐标系中，直线k在x轴上的截距为4，其斜率为2。解：本题的正确答案是(A)。根据点斜式可以写出该直线的方程如下：Y=-2(x-4)=-2x+8。当x=0时，y=8，也即直线k在y轴上的截距为8。
