x1              x2          y

2.7810836    2.550537003    0
1.465489372  2.362125076    0
3.396561688  4.400293529    0
1.38807019   1.850220317    0
3.06407232   3.005305973    0
7.627531214  2.759262235    1
5.332441248  2.088626775    1
6.922596716  1.77106367     1
8.675418651  -0.242068655   1
7.673756466  3.508563011    1