What years does the U. S. federal government us as the base year to calculate CPI?

Currently, the reference base for most CPI indexes is 1982- 84=100 but some indexes have other references bases. The reference base years refer to the period in which the index is set to 100.0. In addition, expenditure weights are updated every two years to keep the CPI current with changing consumer preferences.

(- 1, 0 )

step-by-step explanation:

an x- intercept is where the function crosses the x- axis.

to find the x- intercept/s look for the value of x when f(x) = 0

from the given table there are 3 values of x where f(x) = 0

when x = - 1, x = 2, x = 3

the one that is listed is (- 1, 0 )