Which of the following is an example of positive correlation? O a. More football you play, less weight you will gain. O b. As weather gets hotter, the cost of air conditioning increases. O C. As a car...

Extracted text: Which of the following is an example of positive correlation? O a. More football you play, less weight you will gain. O b. As weather gets hotter, the cost of air conditioning increases. O C. As a car tire has more air, the car may use less gas per mile. O d. The older man gets, he may have less hair.