What is the vertex of the graph of y = –x2?

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 you have 12 feet of string and you cut it into equal length of 5 inches each how much string will be left

Consider the sequence below. 3 , 1 , 1/3 , 1/9 , select the explicit function which defines the sequence.