Tonya plans to join a fitness club. She researched the costs to join different clubs in her area and found that there is a linear relationship between the total cost of belonging to a club and the number of months that you are a member. Each club charges monthly dues, and some clubs require new members to also pay a one-time membership fee. The total costs of being a member for 6 months, 12 months, and 24 months at each of three clubs are shown in the table.

Total Cost of Fitness Club Membership

Length of membership

Club 1

Club 2

Club 3

6 months

$108

$120

$126

12 months

$216

$210

$252

24 months

$432

$390

$504

How many of the clubs require new members to pay a one-time membership fee?

A: 0

B: 1

C: 2

D: 3

The correct answer is b

b because it’s the only one that doesn’t double in value