From a learning point of view, simple linear regression modeling is worth studying because it is the gateway to understanding more advanced forms of statistical modeling.
This series has studied two applications of simple linear regression analysis.
simple linear regression model
simple linear regression
These are some of the more advanced topics awaiting the student of simple linear regression.
Indeed, using basic tools like simple linear regression initially is a good way to begin probing data for patterns.
These transformations can linearize the data so that simple linear regression can be used to model the data.