1.经过点A(8,-2),斜率是-1/2
y+2=(-1/2)(x-8)
x+2y+12=0
2.经过点B(4,2)平行于x轴
y=2
y-2=0
3.经过点P1(3,-2),P2(5,-4)
(x-5)/(3-5)=(y+4)/(-2+4)
x+y-1=0
4.在x轴,y轴上的截距分别是3/2,-3
x/(3/2)+y/(-3)=1
2x-y-3=0
1.经过点A(8,-2),斜率是-1/2
y+2=(-1/2)(x-8)
x+2y+12=0
2.经过点B(4,2)平行于x轴
y=2
y-2=0
3.经过点P1(3,-2),P2(5,-4)
(x-5)/(3-5)=(y+4)/(-2+4)
x+y-1=0
4.在x轴,y轴上的截距分别是3/2,-3
x/(3/2)+y/(-3)=1
2x-y-3=0