Researchers say chuea advertising expenses affect sales, that changed. These centres, advertising expenses, as the independent variable (X) and a sales variable (Y) by the phapkrachai image can be generated.
Researchers believe that the cost of advertising affects sales change. The other hand, the cost of advertising as the independent variable (X) and sales as the dependent variable (Y) can create a scatter diagram is shown below.
Is that the researchers such as advertising costs affect the sales change. So the cost of advertising the independent variables (X) and sales variable (Y) can create a scatter diagram louder.