-9 -6.84307 1
-7.5 -5.34808 0.2
-2.5 -0.811542 0.7
-0.5 -1.22456 0.5
1.5 1.24481 1.8
3 3.19375 1.1
5.5 4.8006 0.3
8.5 7.47098 1.2