regression - How do I explain the line of best fit in this diagram? - Cross Validated

I teach an intro statistics class at my university (as a graduate student) and I was scouring the internet for interesting graphs on the history of linear regression when I came upon this picture

How to Interpret Adjusted R-Squared and Predicted R-Squared in Regression Analysis - Statistics By Jim

Scatter plots, best fit lines (and regression to the mean)

K-Fold Cross Validation in Machine Learning - Python Example

Simple AutoML for time series with Ray Core — Ray 2.9.3

Python Machine Learning Linear Regression

Frontiers Common statistical concepts in the supervised Machine Learning arena

regression - How do I explain the line of best fit in this diagram? - Cross Validated

What Is Regression? Definition, Calculation, and Example

Constructing a best fit line

7 of the Most Used Regression Algorithms and How to Choose the Right One, by Dominik Polzer

What is “Line of Best fit” in linear regression?

4. Regression and Prediction - Practical Statistics for Data Scientists [Book]