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Answer: constant
Total revenue is maximized and constant at Ed=1.
Answer: tangent
Tangency ensures MRS equals the price ratio.
Answer: indifference
Indifference curve shows ordinal ranking of preferences.
Answer: negative
Demand falls as income rises for inferior goods.
Answer: increase
Rightward shift indicates higher demand at the same price.
Answer: snob
Snob/prestige goods violate the basic law of demand.