The slope of ___curve will be positive if and only if the marginal cost curve lies above theAC curve. May 1, 2021 by admin Question: The slope of ___curve will be positive if and only if the marginal cost curve lies above theAC curve. A. AC B. MC C. ATC D. MP Answer» a. AC Note: The above multiple-choice question is for all general and Competitive Exams in India.