Toni has 4 cards in front of her. Her task is to choose 1 more card to add to her 4 cards so that the sum of all 5 cards is 0. Which card should Toni choose?

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