Question

Armand plans to save money every month for the next six months. The function f(x)=2x−1 represents the amount of money, in dollars, Armand will deposit into his savings account at the end of x months since the time he started saving. Which of the following represents the amount of money, in dollars, Armand deposits into his savings account at the end of 3 months since the time he started saving? Select all that apply.

Answer 1

f(x) represents the total savings for x months. If the number of months is 3, then x = 3.

f(x) = 2x - 1
f(3) = 2(3) - 1
= 6 - 1
f(3) = 5