The level of household Income rose from $28.000 10 $30,000 and the number of es consumed annually per capite increased to 140 to 150. Assunting that the economic variables were ad con A the arc income castity of demand is equal to Besarean eror good and one of the above is correct the arc income stoly of demand is equal to -6.1 the are income castory of demand is equal to 1