2. You recently converted to an online banking account. It also came with a debit card. Upon reading the conditions of the account
, you discover that in addition to a $7 month-
ly fee, there is a $0.25 charge for each electronic check and $0.25 for each swipe of
the debit card. Therefore, you consider acquiring a separate credit card. The credit
card comes with a $108 annual fee.
a. Let x represent your number of monthly transactions, i. e., both electronic checks and
credit card swipes. Write a linear function that represents the total fees assigned to
your online banking account each month.
b. What is the monthly cost of the credit card you are considering?
c. How many transactions do you need to average each month to justify the addition-
al credit card?