With higher fuel costs,airlines raise their average fare from $0.50 to $1.50 per passenger kilometre and the number of passenger kilometres decreases from 2.5 million a day to 1.5 million a day.When the price is $1 per passenger kilometre,the demand for air travel is
A)perfectly elastic.
B)perfectly inelastic.
C)unit elastic.
D)elastic.
E)inelastic.

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The Answer of With higher fuel costs,airlines raise their average fare from $0.50 to $1.50 per passenger kilometre and the number of passenger kilometres decreases from 2.5 million a day to 1.5 million a day.When the price is $1 per passenger kilometre,the demand for air travel is
A)perfectly elastic.
B)perfectly inelastic.
C)unit elastic.
D)elastic.
E)inelastic.

With Higher Fuel Costs,airlines Raise Their Average Fare from $0