题目内容
过点(-1,3),且斜率为-2的直线的斜截式方程为_______.
y=-2x+1
[解析] 点斜式为y-3=-2(x+1),化为斜截式为y=-2x+1.
A.2x+y-1=0
B.2x+y-5=0
C.x+2y-5=0
D.x-2y+7=0