Sam will rent a car for a day. The rental company offers two pricing options: Option A and Option B. For each pricing option, cost (in dollars) depends on miles driven, as shown below.

(a) If Sam drives the rental car 100 miles, which option costs more?
Option A
Option B
How much more does it cost than the other option?
$
(b) For what number of miles driven do the two options cost the same?
0
If Sam drives less than this amount, which option costs more?
Option A
Option B