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The demand curve is downward sloping illustrating the inverse relationship between quantity demanded and price. Therefore, a downward sloping demand curve embeds the law of demand. In a more specific manner: [3] = (,,,)
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). As price goes up quantity demanded reduces and as price reduces quantity demanded increases.
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 utility hypothesis tells us nothing about market demand unless it is augmented by additional requirements. [19] In other words, it cannot be assumed that the demand curve for a single market, let alone an entire economy, must be smoothly downward-sloping simply because the demand curves of individual consumers are downward-sloping.
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]
The intercept of the curve and the vertical axis is represented by a, meaning the price when no quantity demanded. and b is the slope of the demand function. If the demand function has the form like that, then the Total Revenue should equal quantity demanded times the price of the good, which can be represented by: TR= q*p = q(a-bq).
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.
The good one is the good this consumer spends most of his income on (=), which is why the income effect is so large. One can check that the answer from the Slutsky equation is the same as from directly differentiating the Hicksian demand function, which here is [3]