Alani receives a collection of coins from her mother as a gift. She wants to start collecting coins. She projects the total number of coins she believes she will own over the next 5 years and graphs the
results.
The graph shows the relationship between the number of
coins Alani believes she will own and the amount of time
she thinks it will take to acquire them.

Complete the table using the data from the graph.
Year
Number
of Coins

()

()

()

3 6
()

()
0 0
1 2
2 4
What is the recursive formula that represents the total number of coins for the nth year if Alani keeps
collecting coins at the same rate?

What is an explicit formula that represents the situation?

What is the domain of ()?