Which situation best represents a linear function?
A.
A bakery charges a $55.00 delivery fee, in addition to $3.00 per slice for a wedding cake.
B.
A $55.00 deposit earns 3% interest each month.
C.
A small town, with an initial population of 55, has a population increase of 3% each year.
D.
The number of initial bacteria in a culture, 55, triples each hour.