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The inverse linear demand function and the marginal revenue function derived from it have the following characteristics: Both functions are linear. [7] The marginal revenue function and inverse demand function have the same y intercept. [8] The x intercept of the marginal revenue function is one-half the x intercept of the inverse demand function.
A demand curve is a graph depicting the inverse demand function, [1] a relationship between the price of a certain commodity (the y-axis) and the quantity of that commodity that is demanded at that price (the x-axis).
To compute the inverse demand equation, simply solve for P from the demand equation. [12] For example, if the demand equation is Q = 240 - 2P then the inverse demand equation would be P = 120 - .5Q, the right side of which is the inverse demand function. [13] The inverse demand function is useful in deriving the total and marginal revenue ...
The standard logistic function is the logistic function with parameters =, =, =, which yields = + = + = / / + /.In practice, due to the nature of the exponential function, it is often sufficient to compute the standard logistic function for over a small range of real numbers, such as a range contained in [−6, +6], as it quickly converges very close to its saturation values of 0 and 1.
When supply and demand are linear functions the outcomes of the cobweb model are stated above in terms of slopes, but they are more commonly described in terms of elasticities. The convergent case requires that the slope of the (inverse) supply curve be greater than the absolute value of the slope of the (inverse) demand curve:
In keeping with modern convention, a demand curve would instead be drawn with price on the x-axis and demand on the y-axis, because price is the independent variable and demand is the variable that is dependent upon price. Just as the supply curve parallels the marginal cost curve, the demand curve parallels marginal utility, measured in ...
The rule also implies that, absent menu costs, a monopolistic firm will never choose a point on the inelastic portion of its demand curve. For an equilibrium to exist in a monopoly or in an oligopoly market, the price elasticity of demand must be less than negative one ( 1 η < − 1 {\displaystyle {\frac {1}{\eta }}<-1} ), for marginal revenue ...
In some cases, there is a unique utility-maximizing bundle for each price and income situation; then, (,) is a function and it is called the Marshallian demand function. If the consumer has strictly convex preferences and the prices of all goods are strictly positive, then there is a unique utility-maximizing bundle.