Can someone please answer question 38 and 39 for me? Make sure u show work. Thank you

15 and 14.7 are 1 apart, so 15 – 14.7 must be 1.

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

If 3 3/4 lb. of candy costs 20.25 how much would 1lb. of candy cost