What happens when we try the option for “Best Subsets”

What happens when we try the option for “Best Subsets” inside Minitab for my “Good Problem” question? (Click “Regression” then “Best Subsets”. List the INDEPENDENT VARIABLES as the “free predictors”.) 

Note that Minitab labels “Response” variable what we call “dependent variables”; likewise, Minitab labels “free response” variables what we call “independent variables”.

How can we take this “chart” and use it to find the Regression Equation? What is the equation?

HINT: The “s” column shows the standard error for each model. The last few columns show which variable(s) are in the model. (The “x” means the variable is used in the model.)