线性回归

参考：

https://mp.weixin.qq.com/s/9XnYZWJXxrNxHP7H38Z7Nw

https://blog.csdn.net/alw_123/article/details/82193535

https://blog.csdn.net/alw_123/article/details/82825785

https://blog.csdn.net/great_yzl/article/details/120237920

https://blog.csdn.net/Mrrunsen/article/details/120260730

https://zhuanlan.zhihu.com/p/77686118

https://blog.csdn.net/qq_45797116/article/details/112437862

https://blog.csdn.net/keeppractice/article/details/106529867