The demand charts are a graphical representation of the law of demand and also the purchase of goods / services at each amount of price. as when price falls the demand
increases
The demand curve
Now let's say p1 is the normal price with normal demand in the market but let's say tomorrow is black friday christmas sale the prices of your need and wants will decrease as p1 price decreases to p2 and the demand increases from q1 to q2 , this is one of the demand graphical presentation
Movements along a demand curve
Well here we are going to talk about quantity demand , it is different from demand as quantity demand talks about the quantity of objects demand
A fall in price from p1 to p2 causes demand to extend from q1 to q2 whereas when the price increases from p1 to p2 or p3 the demand starts to contract and they start decreasing from q1 to q3 or q2. A contraction in demand means a failure in quantity demanded due to the increase in price , an extension in econ is demand increase when they decrease the price of the object . The market demand is the sum of all individual demand for a particular product in the public market
Individual demand and market demand
The market demand is the sum of the demand for a particular item for example a movies ticket costs 10 dollars , the total male customers in one week are 400 while the total women customer are 500 thus they get 900 customers per week who pay 10 dollars to watch the movie , lets look at the graphical representation
as you can see q stands for quantity of customers while dm stands for demand for male customers ,
As you can see the demand representation for women customers for the movie.
As you can see this is the graphical representation of the total customers quantity demanded for the movie tickets