Will Kenton is an expert on the economy and investing laws and regulations. He previously held senior editorial roles at Investopedia and Kapitall Wire and holds a MA in Economics from The New ...

Paige McLaughlin / Investopedia A demand curve displays the change in ... The law of demand works with the law of supply to explain how market economies allocate resources and determine the ...

Demand and supply curves can be charted on a graph ... Variety, though, allows for substitution across types. For example, the market for tomatoes involves more than simply matching buyers and sellers ...