Test Information Description Instructions Multiple Attempts This test allows 3 attempts. This is attempt number 1. Force Completion This test can be saved and resumed later. Your answers are saved automatically. Question Completion Status: Moving to another question will save this response. Question 28 The upward slope of the supply curve reflects the law of supply. principle of specialization in production. law of diminishing marginal utility. fact that price and quantity supplied are inversely related. Moving to another question will save this response.