line offset:	2799.6612	3548.9813	12746.4549	15080.4061
line slope:	1236.2983	 773.0956	2003.4139	 701.3505
slope ratio:	   1.5992	   2.8565
subtract ped line offset:	-10173.3162	-6755.3526	-15881.9515	-5974.0799
subtract ped line slope:	1236.3300	 773.1035	2003.5814	 702.3127
slope ratio:	   1.5992	   2.8565
offset:	-10169.7692	-6754.4754	-15863.2426	-5866.5800
x a,b,c:	   0.4009	  -0.9941	   0.0305
y a,b,c:	   0.0651	   1.1750	   0.0562
fval:	   0.2407	   0.1102
x err:	   0.2568	   0.1444	   0.2124
y err:	   0.2276	   0.1873	   0.1293