But even with the best fitting mask, some people might want extra protection in some situations.

但即使戴上了最贴合的口罩，部分人在某些情况下也可能需要额外的防护。

Or I guess you could call it the best fitting line.

或者我猜你可以称之为最合适的线。

And what we want to do is find it the best fitting regression line, which we suspect is going to look something like that.

我们要做的是找到最合适的回归线，我们怀疑它看起来像那样。

We got to a formula for the slope and y-intercept of the best fitting regression line when you measure the error by the squared distance to that line.

当您通过到该线的平方距离测量误差时，我们得到了最佳拟合回归线的斜率和 y 截距的公式。

So if you viewed this as the best metric for how good a fit a line is, we're going to try to find the best fitting line for these points.

因此，如果您将此视为衡量直线拟合程度的最佳指标，我们将尝试为这些点找到最佳拟合直线。