What is supply and demand?
Supply and demand are economic terms in a free-market economy that dictate the price of a good or service. Typically shown on a two-dimensional axis where y is price and x is the quantity, the price of a particular good or service is when the two linear lines intersect. Supply has a negative sloping line indicating that when demand is fixed an increase in quantity of a good or service results in a lower unit price of that good or service. Demand has a positive linear line meaning that has more demand for a good or item increases while supply remains fixed then the price for that good or service increases.
Below is an instruction that describes a task, paired with an input that provides further context. Write a response that appropriately completes the request.
### Instruction: What is supply and demand?
### Input: 
### Response: Supply and demand are economic terms in a free-market economy that dictate the price of a good or service. Typically shown on a two-dimensional axis where y is price and x is the quantity, the price of a particular good or service is when the two linear lines intersect. Supply has a negative sloping line indicating that when demand is fixed an increase in quantity of a good or service results in a lower unit price of that good or service. Demand has a positive linear line meaning that has more demand for a good or item increases while supply remains fixed then the price for that good or service increases.