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(x+1)2+y2=2 (x-1)2+y2=2 (x+1)2+y2=4 (x-1)2+y2=4
(x+1)2+y2=2 (x+1)2+y2=8 (x-1)2+y2=2 (x-1)2+y2=8
3x﹣2y﹣1=0 3x﹣2y+1=0 2x﹣3y+1=0 2x﹣3y﹣1=0
3x-y-5=0 x+3y-5=0 3x-y-1=0 x+3y-1=0
3x-y-5=0 3x+y-7=0 x+3y-5=0 x-3y+1=0
2x-y=0 2x-y-2=0 x+2y-3=0 x-2y+3=0
2x–y=0 2x–y–2=0 x+2y–3=0 x+2y–5=0
x-2y+4=0 3x+4y-18=0 y+3=0 x-2=0
x2+y2-4x=0 x2+y2+4x=0 x2+y2-2x-3=0 x2+y2+2x-3=0
2x+3y﹣8=0 3x﹣2y+1=0 x+2y﹣5=0 3x+2y﹣7=0
3x+2y-7=0 2x+y-4=0 x-2y-3=0 x-2y+3=0
x+y-5=0 x+y-3=0 x-y-1=0 x-y+1=0