Answer:
 960 represent the population of frog after 6 weeks.
Explanation:
Given: The frog population at a lake doubles every week. The population can be modeled by 
 and f(6) = 960
 and f(6) = 960
We have to tell what this 960 represents.
Since, The population can be modeled by 
 
 
where x represents the week.
Thus, when x = 6 
The model becomes, 
 
 
Which simplifies to 960.
This implies that the population of frog after 6 week is 960.
Thus, 960 represent the population of frog after 6 weeks.