Suppose that you want to save money and would like to find a savings option that earns you the most money in interest. You have $1000 to put towards savings. After surveying several banks for savings plans, you found
these options. "A" represents the amount you will have in the bank after years.
Option A: Your money would receive simple interest at the end of 5 years.
The formula is: A = 1000 + 1000(0.05)x
Option B: Your money will be compounded continuously.
The formula is: A = 1000(2.71828)^(0.05x)
Option C: You will invest in a CD (Certificate of Deposit) compounded yearly
The formula is: A = 1000(1.05)^x
Option D: You buy a US Savings Bond.
The savings bond costs $1000 now. When cashed in 5 years later, the amount will be $1267,
You must leave the money in the savings bond for 5 years to earn any interest. But, you do not
receive any additional interest if you leave it in longer than 5 years.

1. Each option represents a function. State the type of function (linear, exponential, or "other")
described by each of the options. Explain your answers.