What Gauss did was said, let's fit a line through the point-- the scatter of points--and that's called the regression line.

高斯说,做这样的一条直线,切合所有散点,这就是回归直线

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That's called the regression line and the intercept is called alpha--there's alpha.

这就是回归直线,这个是截点,用alpha表示...这里是alpha

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