Nolan is deciding between two truck rental companies. Company A charges an initial fee of $15 for the rental plus $1.50 per mile driven. Company B charges an initial fee
of $35 for the rental plus $1 per mile driven. Let A represent the amount Company A
would charge if Nolan drives x miles, and let B represent the amount Company B
would charge if Nolan drives x miles. Graph each function and determine the interval
of miles driven, x, for which Company A is cheaper than Company B.