1 1 point 2 The US CPI index rose from 207.3 in 2007 to 245.1 in 2017. We can denote CPI 2007 as Po and CPI 2017 as Pt. Calculate the average annual rate of inflation over this period. To find an average annual percentage change we use the formula 1 + r = e In The annual percentage increase in the US CPI is type your answer... %, rounded to two decimal places. 1 point Using the power rule, find the first derivative of f(x), AKA ' (x). f'(x)= type your answer... + type your answer... bx+ type your answer... CX^2