Devise the exponential growth function that fits the given data, then answer the accompanying question. be sure to identify the reference point (t= 0) and units of time. between 2005 and 2010 , the average rate of inflation in a certain country was about 4 % per year. if a cart of groceries cost $190 in 2005 , what will it cost in 2015 assuming the rate of inflation remains constant? what is the reference point (t=0)? a. the inflation rate, 5% b. the cost of groceries $120. c. the year 2010. d. the year 2005. e. the year 2015.