The number of bacteria in a certain culture is modeled by the function , where is the number of bacteria and is the number of hours since the experiment began. Which of the following is the best interpretation of "" in this context?
The number of bacteria increases by 150 every hour.
The initial number of bacteria in the culture was 150.
It takes 150 hours for the bacteria population to double.
The maximum number of bacteria the culture can hold is 150.