Every day you collect 4 pennies and keep them in a jar. so the first day you have 4 pennies, the second day you have 8 pennies, the third day you have 12 pennies, etc. how many do you have on the 15th day?

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