## A Park Ticket

## Opening

# A Park Ticket

Discuss the following with your classmates.

- At an amusement park in California, the cost of admission is $75.
- This table shows the costs of tickets for different numbers of adults.
- You can see from the table that the cost of the tickets is always 75 times the number of adults. You can express this relationship using the ratio 75:1.
- When the ratio between two varying quantities remains constant, the relationship between the two quantities is called a
*proportional relationship*. - The relationship between the number of adults and the cost of tickets is constant; thus, the relationship is a proportional relationship.