Rosana is tracking how many customers she can serve in a morning. She listed the number of customers served per hour in the following table: Hour (x) Number of Customers f(x) 1 3 2 5 3 7 Determine if these data represent a linear function or an exponential function, and give the common difference or ratio. This is a linear function because there is a common difference of 2. This is an exponential function because there is a common ratio of 2. This is a linear function because there is a common difference of 3. This is an exponential function because there is a common ratio of 3.