In a rectangular coordinate system, line k has x-intercept 4 and slope-2.Colum

游客2024-01-12  18

问题 In a rectangular coordinate system, line k has x-intercept 4 and slope-2.

Column A                      Column B
The y-intercept of k          2

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 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。
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