Bikes and roller blades are substitutes. Marginal utility theory predicts that when the price of a bike rises, the quantity of bikes demanded

Question

Answer

decreases and a movement occurs down along the demand curve for roller blades.

Answer

decreases and the demand curve for roller blades shifts leftward.

Answer

increases and the demand curve for roller blades shifts leftward.

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increases and the demand curve for roller blades shifts rightward.

Answer

decreases and the demand curve for roller blades shifts rightward.

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