Question

Evan bought 12 postcards during 6 days of vacation. After 9 days of vacation,

how many total postcards will Evan have bought? Assume the relationship is
directly proportional.

Answer 1

Explanation:

Evan bought 18 postcards in 9 days

since he got 12 in 6 days that means he got 2 each day so 9x2=18

or if you add up by 2 9 times you would get 18 :)