un tren aumenta su velocidad a un ritmo constante de 39,8 m/s a 74, 6 m/s en 3,25 segundos ¿cuál será su aceleración promedio?​

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