Rachel bought 12 souvenirs during 2 days of vacation. How many days will Rachel have to spend on vacation before she will have bought a total of 18 souvenirs? Assume the relationship is directly proportional.
days
Let's set up a proportion using the number of souvenirs Rachel bought and the number of days she spent on vacation.
12 souvenirs / 2 days = 18 souvenirs / x days
Cross-multiplying, we get:
12 * x = 18 * 2
12x = 36
x = 36 / 12
x = 3
Therefore, Rachel will have to spend 3 days on vacation before she will have bought a total of 18 souvenirs.