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Luxe Prestige Chronicle

average total cost curve

Author

Sarah Scott

Updated on June 13, 2026

A typical average cost curve has a U-shape, because fixed costs are all incurred before any production takes place and marginal costs are typically increasing, because of diminishing marginal productivity.

What does the average total cost curve reflect?

What Does The Average Total Cost Curve Tell Us? AVERAGE TOTAL COST CURVE: A curve that graphically represents the average total cost incurred by a firm when it comes to the short-run product of a good or service and its quantity.

How do you plot average total cost curve?

To graph average total costs (ATC), you must get the vertical summation of AFC and AVC. Add the two at each output level and plot the points as shown on left. The ATC curve lies above the other two because it is the summation of AFC and AVC. On the left, you can see that it is U-shaped like the AVC curve.

What is the shape of AVC curve?

Average variable cost (AVC) is calculated by dividing variable cost by the quantity produced. The average variable cost curve lies below the average total cost curve and is typically U-shaped or upward-sloping.

What is the shape of AFC?

Average fixed cost curve is a rectangular hyperbola.

What does AVC mean in economics?

In economics, average variable cost (AVC) is a firm’s variable costs (labour, electricity, etc.) divided by the quantity of output produced.

Why does AVC fall and then rise?

Usually, the AVC falls as the output increases from zero to normal capacity output. Beyond the normal capacity, the AVC rises steeply due to the operation of diminishing returns.

When average cost curve is upward marginal cost?

The average variable cost curve lies below the average total cost curve and is typically U-shaped or upward-sloping. Marginal cost (MC) is calculated by taking the change in total cost between two levels of output and dividing by the change in output. The marginal cost curve is upward-sloping.

How do you calculate ATC in economics?

Average cost (AC), also known as average total cost (ATC), is the average cost per unit of output. To find it, divide the total cost (TC) by the quantity the firm is producing (Q).

What is the relationship between MC and AVC?

Following are the relationship between MC and AVC: When MC is less than AVC, AVC falls with increase in the output. When MC is equal to AVC, i.e. when MC and AVC curves intersect each other at point B, AVC is constant and at its minimum point. When MC is more than AVC, AVC rises with increase in output.

Why is AFC downward sloping?

The average fixed costs AFC curve is downward sloping because fixed costs are distributed over a larger volume when the quantity produced increases. AFC is equal to the vertical difference between ATC and AVC. Variable returns to scale explains why the other cost curves are U-shaped.

When the marginal cost curve is above the average total cost curve?

When the marginal cost curve is above an average cost curve the average curve is rising. When the marginal costs curve is below an average curve the average curve is falling. This relation holds regardless of whether the marginal curve is rising or falling.

Why AFC curve is rectangular hyperbola?

AFC curve is rectangular hyperbola because total fixed cost TFC remains constant at all points of AFC i.e. the multiplication between AFC and production quantity at all points of AFC remains constant. It is the reason why AFC declines when production quantity increase.