The table gives the prices of a few items sold at a school cafeteria. item cost bagel $2.00 juice $0.90 sandwich $3.00 cupcake $1.50

The customer price index(cpi), which measures the cost of a typical package of customer goods, was 208.8 in 2011 and 244.1 in 2016.let x=11 corresponding to the year 2011 an estimate to cpi into 2013 and 2014. assume that the data can be modeled by a straight line and the trend to continue idenfinitely. use data points to find such a line and then estimate the requested quantities