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In most circumstances the demand curve has a negative slope, and therefore slopes downwards. This is due to the law of demand which conditions that there is an inverse relationship between price and the demand of commodity (good or a service).
The demand curve, shown in blue, is sloping downwards from left to right because price and quantity demanded are inversely related. This relationship is contingent on certain conditions remaining constant. The supply curve, shown in orange, intersects with the demand curve at price (Pe) = 80 and quantity (Qe)= 120.
According to the law of demand, the demand curve is always downward-sloping, meaning that as the price decreases, consumers will buy more of the good. Mathematically, a demand curve is represented by a demand function, giving the quantity demanded as a function of its price and as many other variables as desired to better explain quantity demanded.
This negative relationship is embodied in the downward slope of the consumer demand curve. The assumption of an inverse relationship between price and demand is both reasonable and intuitive. For instance, if the price of a gallon of milk were to increase from $5 to $15, this significant price rise would render the commodity unaffordable for ...
For a PC company, this equilibrium condition occurs where the perfectly elastic demand curve equals minimum average cost. An MC company's demand curve is not flat but is downward-sloping. Thus, the demand curve will be tangential to the long-run average cost curve at a point to the left of its minimum. The result is excess capacity. [22]
[3] [4] Instead, the downward sloping aggregate demand curve is derived with the help of three macroeconomic assumptions about the functioning of markets: Pigou's wealth effect, Keynes' interest rate effect and the Mundell–Fleming exchange-rate effect.
Markets that face a downward sloping demand curve are said to have market power. This terms means that the markets have a certain power to decide their own price. [3] This does not mean that the firm can decide the quantity they wish to sell. The firm can decide the price and the quantity is determined by the demand curve.
The AD (aggregate demand) curve in the static AD–AS model is downward sloping, reflecting a negative correlation between output and the price level on the demand side. It shows the combinations of the price level and level of the output at which the goods and assets markets are simultaneously in equilibrium.