You have the choice of logging on at one of two Internet cafés. Their posted rates are as follows: Log-On Café: $5.50 plus $0.15 for every minute online eCafé: $4.00 plus $0.20 for every minute online Which café is the best option if you plan on using the Internet for 45 minutes? What is the equation that relates the number of minutes used and the total cost, and how much money will you save?