Final answer:
Regan will have bought 12 souvenirs after 6 days of vacation.
Step-by-step explanation:
To find the total number of souvenirs Regan will have bought after 6 days of vacation, we need to determine how many souvenirs she buys per day. We can do this by finding the average number of souvenirs she buys per day during the first 3 days of vacation.
Regan bought a total of 6 souvenirs during 3 days, so the average number of souvenirs per day is 6 divided by 3, which equals 2 souvenirs per day.
Therefore, if Regan continues to buy souvenirs at the same rate, after 6 days of vacation, she will have bought a total of 2 souvenirs per day multiplied by 6 days, which equals 12 souvenirs