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linear fit (10., 15.1, 19., 25.1, 29.4, 36.5, 40.7, 45.62, 49.7, 57.0, 63.4, 64.5)
linear fit (10., 15.1, 19., 25.1, 29.4, 36.5, 40.7, 45.62, 49.7, 57.0, 63.4, 64.5)
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