The AD (aggregate demand) curve is defined by the ISâLM equilibrium income at different potential price levels. The downward sloping AD curve is derived from the IS/LM model.
Who is considered a junior in college? A full college schedule requires 15 credit hours per semester, 30 credits per scholastic year: thus a sophomore would have earned 60 credits and a student carrying credit hours in excess of 60 credit hours would be conisdered a junior in college. Mohamed Elhegery.
How Much Study: Serious students (studious students) study 50-60 hours a week. Although this should be no surprise (after all, in the 'real world' people rise at 6 or 7 am and work 8 hours or more each day) many freshmen do not trust this figure.