obs  x      y
1   106.2 65.6
2   110.5 71.8
3   115.1 80.7
4   104.5 72.6
5   107.5 78.8
6   119.8 74.8
7   123.5 86.4
8   120.4 78.4
9   111.0 62.0
10  119.5 81.6