Nathaniel is deciding between two different movie streaming sites to subscribe to. Plan A costs $16 per month plus $1 per movie watched. Plan B costs $8 per month plus $3 per movie watched. Let AA represent the monthly cost of Plan A if Nathaniel watches xx per month, and let BB represent the monthly cost of Plan B if Nathaniel watches xx movies per month. Graph each function and determine the number of monthly movies watched, x, x, that would make the two plans have an equal monthly cost.