Demand is represent how many about the quantity of a goods is what the customers wanted. Its refer to about the ability to pay and wanted to buy by the buys. Sometimes demand also calling to another name that is effective demand. Demand can be shows by the demand schedule which is showing the maximum of quantity demanded (wanted and needed to buying) at all prices.
The law of demand is represent about the all factors, if the prices is higher, than people want to buying will be less and low. The demand is represent a downward slope. This can be explain in others, when the price higher, the lower quantity demanded. Or in an opposite side, when lower price, higher quantity demand. Demand can be explaining by using demand schedule and demand curve. The relationship between the quantity and price demand is calling demand relationship.
Here, showing about the demand curve or called also simple demand curve:
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According to the graft, we can see point A; B and C are the point on the simple demand curve. Each point is reflecting a related point between the price (P) and quantity demand (Q). So, at the point A, the price at P1 and quantity demand at Q1, other also is the same. According the demand curve, they representing a downward curve and negative demand relationship. The higher of the price, then the lower of the quantity demand. On opposite side, the lower of the price, the higher of the quantity demand.
Supply is representing about the both of the ability to selling or produce and the willingness to selling by the producers. Sometimes supply also call by