Two friends, Jabal and Alexis, are conducting an experiment to study the relationship between the amount of water they drink and the number of hours they can study effectively. They both start with a baseline of drinking no water and studying for 0 hours. As they increase the amount of water they drink, they observe an increase in the number of hours they can study effectively. After collecting their data, they noticed that Jabal’s data points form a straight line that passes through the origin, while Alexis’s data points form a straight line that intersects the vertical axis at 6.