For each of the following situations, identify the independent variable (explanatory variable) and the dependent variable (explained variable).

a) In a company specializing in the sale of office supplies, we is interested in the adult population where the branches are located as well as the number annual business. Dependent variable: Independent variable:

b) At Amtek, the company accountant would like to study labor costs direct associated with the manufacture of batches of various sizes for a part electromechanical. Dependent variable: Independent variable:

c) In a service company, we are interested in the total number of transactions of a networked computer system and the average system response time. Dependent variable: Independent variable: