I might give away all my point considering the fact that I really can't get any answers because I ran out

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

Determine domain and range, largest open interval, and intervals which function is continuous.

What is the point of inflection for the function f(x)=2cos4x on the interval (0, pi/2)