一个工厂在某年每月产品的总成本 y ()与该月产量 x ()之间有如下数据: x 1.08 1.12 1.19 1.28 1.36 1.48 1.59 1.68 1.8 1.87 1.98 2.07 y 2.25 2.37 2.4 2.55 2.64 2.75 2.92 3.03 3.14 3.26 3.36 3.5 请用 excel画出散点图,求月产品的总成本 y 与该月产量 x 之间的回归直线方程(系数保留4位有效数字)为 ,R2= .
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