Positive feedback[Time]	x[Concentration]	y[Concentration]
0	0.4	0.5
4	0.358368	0.388517
8	0.11074	0.179707
12	0.00342357	0.0153803
16	6.30822e-05	0.000533775
20	1.1554e-06	1.4398e-05