Oftentimes, you’ll want to fit a line to a bunch of data points. This tutorial will show you how to do that quickly and easily using open-source software, R.
How to Add a Regression Equation to a Plot in R
Fit Smooth Curve to Plot of Data in R - GeeksforGeeks
Joining Points on Scatter plot using Smooth Lines in R - GeeksforGeeks
How to automatically select a smooth curve for a scatter plot in SAS - The DO Loop
data visualization - How to add non-linear trend line to a scatter plot in R? - Cross Validated
Karl Arao's TiddlyWiki
Creating a Line of Best Fit in R - Stack Overflow
How can I explore different smooths in ggplot2?
Karl Arao's TiddlyWiki
How to: make a scatterplot with a smooth fitted line
How to add Fit Line (Trend Line) at subgroups in a scatter plot. - JMP User Community