Chapter 4 extra practice:
PDF Lesson 4.1.1: Line of Best Fit
PDF Lesson 4.1.2 & 4.1.3: Residuals and Upper and Lower Bounds
PDF Lesson 4.1.4: Least Squares Regression Line
PDF Lesson 4.2.1, 4.2.2, & 4.2.4: Residual Plots and Correlation
PDF Lesson 4.2.3: Association and Causation
Video: Interpreting trend line
Video: Residuals
Video: Create LSRL on Desmos
Video: Least Squares Regression Line
Video: Line of Best Fit
Click this link for extra practice on Khan Academy:
Using a line of best fit.