Write an explicit formula for the sequence -4, 1, 6,

an= -4+ 5(n+1)
an= -4+ 5(n-1)
an= -4+ (n-1)
an= -4+ 5n

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