Supply refers to the amount of the good or service able to be supplied. Demand refers to the public’s want of the said good or service. Supply and demand are interconnected because if the supply is low, the demand will be high and the price will rise. If the supply is high, so there are many of the said item or service, then the demand won’t be as high since there is a surplus in supply which leads to lower prices to entice consumers to buy still.