The function gives the estimated number of marine mammals in a certain area, where is the number of years since a study began. What is the best interpretation of in this context?
The estimated number of marine mammals in the area was 102 when the study began.
The estimated number of marine mammals in the area was 1,800 when the study began.
The estimated number of marine mammals in the area increased by 102 each year during the study.
The estimated number of marine mammals in the area increased by 1,800 each year during the study.
