The manager of Extreme Video Games keeps track of the profits the company earned after releasing one of its latest games. During the first week, the game profits were $15,000. In the second week, the profits grew to $22,500. In the third week, profits held steady at $22,500, and in the fourth week, profits grew to $25,000. Using x to represent the week and y to represent the profits earned, create a mapping diagram to represent this relation.