Refer to the graph below. Which demand curve is perfectly inelastic?

Refer to Figure 8.1. Holding other variables constant, an improvement in technology will result in a

A) shift from curve D1 to curve D2. B) shift from curve D2 to curve D1. C) movement from point A to point B. D) movement from point B to point A.

We would expect the aggregate demand curve to be

A. Vertical. B. Horizontal. C. Upward sloping. D. Downward sloping.