A company that relies on Internet-based advertising linked to key age demographics wants to understand the relationship between the number of different internet based ads um a) Which variable is the explanatory or predictor variable? A. Since the company wants to predict units from ads used the explanatory variable is ads used. B. Since the company wants to predict units from ads used, the explanatory variable is units. OC. Since the company wants to predict ads used from units, the explanatory variable is units. OD. Since the company wants to predict ads used from units, the explanatory variable is ads used b) Which variable is the response variable? O A. Since the company wants to predict units from ads used, the response variable is ads used. OB. Since the company wants to predict ads used from units, the response variable is units C. Since the company wants to predict units from ads used, the response variable is units D. Since the company wants to predict ads used from units, the response variable is ads used c) Which variable would you plot on the x-axis? O A. Since ads used is the explanatory variable, it should be plotted on the x-axis B. Since units is the explanatory variable, it should be plotted on the x-axis. C. Since ads used is the response variable, it should be plotted on the x-axis D. Since units is the response variable, it should be plotted on the x-axis.