Question 861128
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Hi,
Re TY Simply plotted points at was directed,
connected those points with the diagonal lines 
and then saw that the lines intersected at (1,0)
diangonals Intersect at P(1,0)
{{{drawing(300,300,   -6,6,-12,12, 
 grid(1),
circle(-2, 4,0.4),
circle(4, 10,0.4),
circle(4, -4,0.4),
circle(-2, -10,0.4),
line(4,10,-2,-10),
line(-2,4,4,-4),
graph( 300, 300, -6,6,-12,12))}}}