中等econ-u02-d04
Along a straight-line demand curve, the absolute value of PED is:
A. Higher at higher prices and lower quantities✓ 答案
B. Constant everywhere along the curve
C. Higher only at the midpoint of the curve
D. Higher at the quantity intercept than at the price intercept
解說
On a linear demand curve the slope is constant but elasticity is not: P x Q is constant, so P/Q is larger high up the curve. The midpoint is the unit-elastic point.