Functions with money

Question

Athena starts a new job. She has $40 in her bank account and decides to add $10 to the account at the end of each week of work, where w represents the number of weeks she works. Athena does not add money to the account at the end of her first week of work.

Create a function f(w) that models the amount of money Athena has in her bank account at the end of w weeks of work where w > 1

Answer 1

f(w) = 40 +40w

with w>1, f(w)>$80