The marginal cost curve of a firm above AVC is also its short-run supply curve.

Marginal Cost Curve

A visual diagram indicating the variation in the expense of manufacturing an additional unit of a product as its production levels rise.

AVC

Stands for Average Variable Cost, which is the total variable cost per unit of output.

Short-Run Supply

The supply of goods that occurs when the sellers are only able to change some, but not all, conditions of production.