To explore the rationale for specialization, economists use the
A) real-nominal principle. B) principle of opportunity cost.
C) marginal principle. D) principle of marginal exchange.
Question 2
As the number of advertisements of a firm increases from 100 to 500, its sales increases from 1,000 to 10,000. If this information is plotted on a line chart, the slope of the line equals:
A) 22.5. B) 0.044. C) 30.33. D) 20.