An analyst has found that his company's profits, in hundreds of thousands of dollars, are given by the following equation, where x is the amount, in hundreds of dollars, spent on advertising. for what values of x does the company make a profit?

Which statement best explains the relationship between points a and b? a. consumption reaches its highest point, and then supply begins to fall. b. inflation reaches its highest point, and then the economy begins to expand. c. production reaches its highest point, and then the economy begins to contract. d. unemployment reaches its highest point, and then inflation begins to decrease.