A change in the quantity demanded comes about when there is a change in the price of the good (other things held constant). Such a change in quantity demanded involves a a given demand curve.

Movement along

Explanation:

As we know that

There is an opposite relationship lies between the price and the demanded i.e. quantity as per the law of demand that means if the price increased than the quantity demanded decreased and vice versa

But when some changes are there in quantity demanded by having change in price keeping other things remain constant so the change in quantity demanded would be movement along with the demand curve and the same is to be considered

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