Observation	x1	x2	x3	x4	y
1	43	19.6	7.1	32	200
2	44	13.1	58.5	37	204
3	40	24.7	2.1	32	215
4	35	30.4	41.4	39	229
5	38	28.2	7.7	30	231
6	39	24.9	25	26	243
7	39	45.7	28.5	25	266
8	40	38.4	27.7	24	278
9	47	36.9	26.2	17	287
10	35	66.3	4.2	23	298
11	36	112.8	26.2	21	339
12	44	108.4	22.3	24	359