Answer:
The correct answer is letter "B": the independent variable.
Explanation:
Multiple regression is a mathematical model used concerning two or more variables when one value is to be used. The independent variable is the reason for the research, and the variables are dependent when they represent the value factors that need to be evaluated and are why the analysis is being carried out.
In the example, the independent variable is the weight of the boxes and the dependent variables are the adjustable stabilizer settings of the rotary valve on the filling machine in three different production shifts.