Final answer:
After 6 days of vacation, Celine will have bought a total of 18 souvenirs. Option b
Step-by-step explanation:
To solve this problem, we need to find the relationship between the number of souvenirs and the number of days. Since the relationship is directly proportional, we can set up a proportion. If 15 souvenirs were bought in 5 days, then the ratio is 15/5 = 3 souvenirs per day.
To find out how many souvenirs will be bought after 6 days, we can set up another proportion. We know that 3 souvenirs are bought per day, so for 6 days it would be 3 * 6 = 18 souvenirs.
Therefore, after 6 days of vacation, Celine will have bought a total of 18 souvenirs. Option b