Update 2-Regression/3-Linear/README.md

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

2-Regression/3-Linear/README.md

@@ -1,12 +1,11 @@
-### Beginner Note
+# Build a regression model using Scikit-learn: regression four ways
+
+## Beginner Note
 
 Linear regression is used when we want to predict a **numerical value** (for example, house price, temperature, or sales).
 It works by finding a straight line that best represents the relationship between input features and the output.
 
 In this lesson, we focus on understanding the concept before exploring more advanced regression techniques.
-
-# Build a regression model using Scikit-learn: regression four ways
-
 ![Linear vs polynomial regression infographic](./images/linear-polynomial.png)
 > Infographic by [Dasani Madipalli](https://twitter.com/dasani_decoded)
 ## [Pre-lecture quiz](https://ff-quizzes.netlify.app/en/ml/)