The demand curve is one of the fundamental concepts of economics. It illustrates the relationship between the price of a good or service and the demand for that product, that is, the way a change in ...

A horizontal demand curve literally refers to the line on a graph that shows a specific demand for your product at a specific price. Using a graph to chart your sales based on different prices, you ...

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 School ...

Investopedia contributors come from a range of backgrounds, and over 25 years there have been thousands of expert writers and editors who have contributed. Dr. JeFreda R. Brown is a financial ...