斜率为-2,在y轴的截距为3的直线方程是(  ) A.2x+y+3=0 B.2x-y+3=0 C.2x-y-3=0 D.2x+y-3=0

问题描述:

斜率为-2,在y轴的截距为3的直线方程是(  )
A. 2x+y+3=0
B. 2x-y+3=0
C. 2x-y-3=0
D. 2x+y-3=0

斜率为-2,在y轴的截距为3的直线方程为y=-2x+3,化为2x+y-3=0.
故选:D.