Which one is the assumption of law of demand ........

Economics- Phase (I & II) Consumption Function

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Which one is the assumption of law of demand

Price of the commodity should not change

Quantity demanded should not change

Prices of substitutes should not change

Demand curve must be linear

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Explanation:

Prices of substitutes should not change is the assumption of law of demand. For example if the price of Coke is decreased then it will lead to fall in the demand for Pepsi even when the price of Pepsi has remain constant as Pepsi is close substitute of Coke, in the same way if the price of Coke is increased than it will lead to rise in demand for Pepsi.