In each of the following situations, explain why you would expect linear or exponential growth. Think about whether the change is best described as as an absolute change (like dollars per hour, or gallons per mile) or a percentage (like percent per year or percent per washing). Write the units for the kind of rate you decide on. a) Price increases from year to year due to inflation. b) How the amount of gas you use depends on how far you drive. c) The amount of money left on your Charlie Card as the days go by and you commute to school or work. d) The amount of sales tax you pay, depending on how much you buy. e) The amount of dirt left on your kid's flithy jeans as you wash them over and over again. f) The popuation of the world as the years go by. Your credit card balance if you stop making payments. h) The height of snow as it accumulates in a big storm. i) The number of people sick in the first few weeks of the flu season. j) The number of subscribers to a hot new social network in its first days.