The happiness which forms the utilitarian standard of what is right in conduct, is not...(one's) own happiness, but that of all concerned. As between his own happiness and that of others, utilitarianism requires him to be as strictly impartial as a disinterested and benevolent spectator.
There are various types of cost curves, all related to each other, including total and average cost curves, and marginal (for each additional unit) cost curves, which are equal to the differential of the total cost curves. At a level of Q at which the MC curve is above the average total cost or average variable cost curve, the latter curve is rising. 2  If MC is below average total cost or average variable cost, then the latter curve is falling.
Short-run average cost will vary in relation to the quantity produced unless fixed costs are zero and variable costs constant. A cost curve can be plotted, with cost on the y-axis and quantity on the x-axis. Marginal costs are often shown on these graphs, with marginal cost representing the cost of the last unit produced at each point; marginal costs are the slope of the cost curve or the first derivative of total or variable costs.