6)
The diagram shows the short-run average total cost curves for five different plant sizes
of a firm. The shape of each individual curve reflects:
A.increasing returns, followed by diminishing returns.
B.economies of scale, followed by diseconomies of scale.
C.constant costs.
D.increasing costs, followed by decreasing costs.
7) The price elasticity of demand of a straight-line demand curve is:
A.elastic in high-price ranges and inelastic in low-price ranges.
B.elastic but does not change at various points on the curve.
C.inelastic but does not change at various points on the curve.
D.1 at all points on the curve.
8)
Refer to the diagram. If price is reduced from P1 to P2, total revenue will:
A.increase by A – C.
B.increase by C – A.
C.decrease by A – C.
D.decrease by C – A.
9) A long-run supply curve that is downward-sloping indicates that the firms’ ATC
curves:
A.Shift up when the industry expands
B.Shift down when the industry contracts
C.Shift down when the industry expands
D.Do not shift when the industry contracts