RealClimate: Don't estimate acceleration by fitting a quadratic…
Fitting a Line to Data
IXL Line of best fit
Estimating equations of lines of best fit, and using them to make predictions (practice)
Estimating the line of best fit exercise (video)
Find the line of best fit, College Algebra
Line of Best Fit (Eyeball Method)
Line of Best Fit Practice Worksheet by Mr Slope Guy
Learn What Scatter Plots and Trend Lines Are & How To Interpret Them
Assessment & Evaluation Wheeler's thoughts on teaching