# Section 4: Linear Regression (1-2 of 4)

**References:
**
-  [An Introduction to Statistical Learning](https://www.statlearning.com/)  (Download free pdf)
-  [Jose Portilla's 2021 Python for Machine Learning & Data Science Masterclass](https://www.udemy.com/course/python-for-machine-learning-data-science-masterclass/) 

![6_ml_4a_21Sep21.png](https://cdn.hashnode.com/res/hashnode/image/upload/v1632259488204/uca-K5Ip3.png)

![7_ml_4b_21Sep21.png](https://cdn.hashnode.com/res/hashnode/image/upload/v1632259490148/F4d7dLGhM.png)