Price-fixing agreements among competing firms are a violation of the Clayton Antitrust Act

The total variable cost curve ________ because ________ as output increases

A) slopes upward; variable cost increases B) slopes upward; marginal cost increases C) slopes downward; variable cost increases D) slopes downward; marginal cost increases E) is horizontal; fixed cost does not change

A correlation between two variables implies that:

A) there is a cause-effect relationship between the two variables. B) it is impossible to measure one variable without measuring the other. C) there is a mutual relationship between both the variables. D) when one variable changes, the other variable always changes by exactly the same amount.