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x﹣2y﹣1=0 x﹣2y+1=0 3x﹣2y+1=0 x+2y+3=0
x+2y-1=0 2x+y-1=0 2x+y-3=0 x+2y-3=0
直线x=1 直线y=1 直线y=﹣1 直线x=﹣1
y=﹣x+1 y=﹣x﹣1 y=x+1 y=x﹣1
直线x=1 直线y=1 直线y=﹣1 直线x=﹣1
x+2y-1=0 2x+y-1=0 2x+y-3=0 x+2y-3=0
3y-y1=x-x1 y=3kx+b-2 y-y1=k(x-x1) y=ax -4
直线2x+y-2=0 直线2x+y=0 直线2x+y=0或直线2x+y-2=0 直线2x+y=0或直线2x+y+2=0
x+2y-1=0 2x+y-1=0 2x+y-3=0 x+2y-3=0
x+y+1=0 x-y-1=0 x+y-1=0 x-y+1=0
y=2x -1 y=2x +1 y=2 (x -1) y=2 (x +1)
x+2y-1=0 2x+y-1=0 2x+y-3=0 x+2y-3=0
x+y+1=0 x+y*1=0 x-y+1=0 x-y-1=0
x+2y-1=0 2 x+y-1=0 2 x+y-3=0 x+2y-3=0
x﹣y+1=0 x+y﹣1=0 x﹣y﹣1=0 x+y+1=0
2x+3y﹣8=0 3x﹣2y+1=0 x+2y﹣5=0 3x+2y﹣7=0
)直线y=0对称 ( )直线x=0对称( )直线y=1对称 ( )直线x=1对称
直线y=1 直线x=1 直线y=﹣1 直线x=﹣1
x+2y-1=0 2x+y-1=0 2x+y-3=0 x+2y-3=0