linear fit {{3.9,1.26},{1.3,0.16},{2.1,0.27},{10.4,2.28},{1.2,0.10},{23.4,2.1},{12.2,2.31},{1.2,0.26},{2.2,0.55},{3.5,0.58},{2.2,0.37},{1.6,1.16},{1.47,0.63},{0.86,0.21}}

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