No. 	 x1 	 x2 	 y 
1 	 31 	 1.85 	 4.20 
2 	 46 	 2.80 	 7.28 
3 	 40 	 2.20 	 5.60 
4 	 49 	 2.85 	 8.12 
5 	 38 	 1.80 	 5.46 
6 	 49 	 2.80 	 7.42 
7 	 31 	 1.85 	 3.36 
8 	 38 	 2.30 	 5.88 
9 	 33 	 1.60 	 4.62 
10 	 42 	 2.15 	 5.88