y x1 x2 10.1 5.3 8.5 11.6 5.4 10.3 10.4 4.5 9.4 13 4.7 12.2 12.3 6.6 10.4 11.1 4.2 10.3 11.4 5 10.2 11.3 4.2 10.4 10.1 5.6 8.5 9.7 5.6 7.9 13 5 12.1 13.2 6.9 11.2 10.2 4.7 9 8.8 4.2 7.7 13.5 5.6 12.3 10.3 3.2 9.8 12.6 6.5 10.8 10.1 4.3 9.1 10.9 5.7 9.3 12.2 4 11.6