What is the statistical analysis method that generates the regression line?

great!

I see

I am confused by the meaning of the statistical analysis method you mentioned in the question. Are you asking about the type of regression that can produce a regression line or the estimation methods used in linear regression? To answer the former question, in linear regression, one will find the regression line (or a more complex linear combination) that most closely fits the data according to a specific mathematical criterion. For the second question, many procedures have been developed for parameter estimation and inference in linear regression. The most common methods include least-squares estimation, maximum-likelihood estimation, Bayesian linear regression, etc.