True or false: when a demand curve for a specific product (shoes or apples, for example) is constructed, changes in the number of consumers in the market are held constant.

It is true, when demand curve of a specific product such shoes or apples is constructed consumer income or the number of consumers in the market are held constant. A demand curve is a graph showing the relationship between the price of a commodity and the willingness and ability of consumers to purchase the commodities (demand).