Answer:
The explicit equation is:
Step-by-step explanation:
At the beginning, there was only one dot
Day One has 4 dots, and Day Two has 16 dots
Notice that the increase is geometric.
1 to 4 to 16
The common ratio is 4, because 4/1 = 16/4 = 4
So, we have
Where y represents the number of dots, and x is the day number.
Let y = f(x), and we have the explicit equation we require
To check
For x = 0 (At the beginning)
For x = 1 (Day One)
For x = 2 (Day Two)