2. 在坐標平面上,根據方程式x+5y-7=0,2x+y+4=0,x-y-1=0 畫出三條直線L1,L2,L3,如圖所示。試選出方程式與直線間正確的配置?
(A)L1:x+5y-7=0 ;L2:2x+y+4=0 ;L3:x-y-1=0
(B)L1:x-y-1=0 ;L2:x+5y-7=0 ;L3:2x+y+4=0
(C)L1:2x+y+4=0 ;L2:x+5y-7=0 ;L3:x-y-1=0
(D)L1:x-y-1=0 ;L2:2x+y+4=0 ;L3:x+5y-7=0
(E)L1:2x+y+4=0 ;L2:x-y-1=0 ;L3:x+5y-7=0