Jamie opens up a store to sell coffee. He sells 275 coffee cups after 4 months of opening up the restaurant and then 480 coffee cups in the 8th month. The rate stays constant in terms of its increase. Create an equation that relates the number of coffee cups sold(C) to the time in months(M). How many coffee cups will he sell after 14 months? When will he be able to sell 9700 coffee cups?
