在每幅图中，数据点都作为空心圆而示出，而线性拟合用实线示出。

In each figure the data points are shown as empty circles while a linear fit is shown as a solid line.

youdao

在每幅图中，数据点都作为空心圆而示出，而线性拟合用实线示出。

In each figure the data points are shown as empty circles while a linear fit is shown as a solid line.

youdao