Galton, Pearson, and the Peas: A Brief History of Linear Regression for Statistics Instructors

An examination of publications of Sir Francis Galton and Karl Pearson revealed that Galton's work on inherited characteristics of sweet peas led to the initial conceptualization of linear regression. Subsequent efforts by Galton and Pearson brought about the more general techniques of multiple regression and the product-moment correlation coefficient. Modern textbooks typically present and explain correlation prior to introducing prediction problems and the application of linear regression. This paper presents a brief history of how Galton originally derived and applied linear regression to problems of heredity. This history illustrates additional approaches instructors can use to introduce simple linear regression to students.