To get the best fitting line, you find the line that minimizes the sum of squared distances.

要找到最切合的直线,就是要使,这些距离的平方和最小

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The concept of regression goes back to the mathematician Gauss, who talked about fitting a line through a scatter of points.

回归这个概念要追溯到数学家高斯,讨论的是从若干散点中切合出一条直线

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