Question

One week, Heather opens a bank account with $125. Each week, starting the second week, she deposits $25 into her account. What is the explicit rule for amount of money Heather has in her account after n weeks?.

Answer 1

Multiply the amount of money she deposits weekly by the number of week minus 1 (because she started the second week) and add that to the amount she opened the account with.

Total = 125 + 25(n-1)