Easton is deciding between two different movie streaming sites to subscribe to. Plan A costs $16 per month plus $2 per movie watched. Plan B costs $20 per month plus
$1 per movie watched. Let A represent the monthly cost of Plan A if Easton watches
x per month, and let B represent the monthly cost of Plan B if Easton watches x
movies per month. Graph each function and determine the interval of movies
watched, x, for which Plan A is cheaper than Plan B.