What is the function rule for the following situation? Rex paid $20 for a membership to the pool and pays $3.00 each time he goes to the pool.
A. y = 20x + 3
B. 20 = 3x + y
C. y = x + 20
D. none of these
The correct answer is:
A. y = 20x + 3
Where:
- x represents the number of times Rex goes to the pool
- 20 is the fixed cost of the membership
- 3 is the additional cost per visit
So the equation represents the total cost (y) as a function of the number of visits (x).