Describe the graphical portrayal of marginal cost. Multiple choice question. The marginal cost curve declines sharply at first, reaches a minimum, and then flattens out. The marginal cost curve rises sharply at first, reaches a maximum, and then continues rising but at a slower rate. The marginal cost curve declines at first, reaches a minimum, and then rises rather quickly. The marginal cost curve rises sharply at first, reaches a maximum, and then declines rather quickly