A person can join The Fitness Center for $50. A member can rent the tennis ball machine for $10 an hour. Write a linear function to model the relationship between the number of hours the machine is rented (x) and the total cost (y).
what is the initial value?
Determine the cost for renting the tennis ball machine for 2 hours? for 5 hours? 0 hours?
How many hours did a member rent the tennis ball machine if the total cost was $130?
