How do the variables price and quantity demanded relate to each other?

Question

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In economics, the law of demand states that the quantity demanded of a good or service will decrease as its price increases, holding all other factors constant. Therefore, price is the independent variable that determines the quantity demanded, which is the dependent variable. As the price increases, consumers will typically buy less of the product, which results in a decrease in quantity demanded. Conversely, as the price decreases, consumers will typically buy more of the product, which results in an increase in quantity demanded. Thus, price and quantity demanded are inversely related to each other.

How Do the Variables Price and Quantity Demanded Relate to Each