Which of the following scenarios models the equation y=2x+5?

There are initially 5 chickens on the farm. Each month thereafter the number of chickens is 2 times the number in the month before.

Nina earns $2.00 for each Enjoy the City book she sells. Each time she sells a book she also gets a five-dollar tip.

Gabby charges $2.00 an hour for babysitting. Parents are charged $5.00 if they arrive home later than scheduled.