Answer:
The function which models the situation is as The number of oak trees increase after n year = 12 × 
Step-by-step explanation:
Given as :
The number of oak trees planted in park = 12
The rate at which number of tree increase each year= 25%
Now,
The number of oak trees increase after n year = Present numbers of tree × 
Or,
The number of oak trees increase after n year = 12 × 
Hence The function which models the situation is as The number of oak trees increase after n year = 12 ×
Answer