"x1"	"x2"	"y"
16.7	30	210
17.4	42	110
18.4	47	103
16.8	47	103
18.9	43	91
17.1	41	76
17.3	48	73
18.2	44	70
21.3	43	68
21.2	50	53
20.7	56	45
18.5	60	31