Answer:
(a) Initial ticket = 60
(b) 5 tickets
Step-by-step explanation:
Given

Solving (a): Initial Tickets
A linear function is represented as:

Where c is the initial value
In this case, c represents the initial tickets.
By comparing
to 

Solving (b): Tickets needed on each ride
This represents the rate
In
, m represents the rate
By comparing
to 

It is negative because 5 tickets is subtracted for each ride.
Hence, the number of ticket per ride is 5