Meghan screen prints T-shirts for sale at concerts. When buying blank T-shirts, the price Meghan must pay is related to the size of the order. Four of her previous orders are listed in the table below. Number of Shirts 150 320 360 450 Cost per Shirt ($) 15.85 15.00 14.80 14.35 Meghan has misplaced the information from her supplier about prices on bulk orders. She would like to get the price per shirt below $12.50 on her next order. Extrapolate the graph and determine the number of T-shirts she should order. Show your work. (What regression model should Meghan use?)