During which intervals is the function decreasing? Select all that apply.
A. -9 B. -6 C. 0 D. 3 E. 6

Can any one me with the answers to these questions asap?

Which one ? is the answer and how to find this answer

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