The total cost of a taxi consists of a mileage rate and an initial fee. A rider notices that at 4 miles the cost was $12.00 and at 6 miles the cost was $16.50. Which of the following
equations can be used to model the total cost of a taxi ride, y, as a function of length of
ride in miles, X?

James wants to promote his band on the internet. site a offers website hosting for $4.95 per month with a $49.95 startup fee. site b offers website hosting for $9.95 per month with no startup fee. for how many months would james need to keep the website for site a to be a better choice than site b?