Demand and supply

Supply and Demand is an economic model which determines the price of any object.
Coming to demand, it can be explained as how much a buyer desires.
The law of demand states that higher the price of a good,the less is the demand.For example if the price of a particular brand of edible oil increases then less will be the demand because oil is needed in day to day life of a human being and if the price goes up then the demand will decrease as maximum people tends to buy the product of a less price.
And coming to supply, it can be defined as the quantity sold at a particular price.
It depends on the amount of a certain goods producers supply after receiving a particular price.
In this case if price of a product increases then supply also increases. This happens because selling more product of higher price can create a more revenue.
For example if the price of apple increases by 20 on its actual price then supply will be high in order to gain more revenue on it ,on the other hand if the price gets lowered by rs 20 then supply will be less and demand will increase then price can again get a hike. This is the basic concept of supply.