Question $45$

$1$ pts

Since World War II$,$ the consumer price index $($CPI$)$ has increased by an average of $q,$

$2\mathrm{.}1$ percent per year.

$5\mathrm{.}6$ percent per year.

$3\mathrm{.}5$ percent per year.

$6\mathrm{.}4$ percent per year.

$1\mathrm{.}4$ percent per year.