QUESTION $7$

$10$ points

The following linear trend expression was estimated using a time series with $17$ time periods.

$T_t=129\mathrm{.}5+4\mathrm{.}8t$

The trend projection for time period $18$ is

a$.215\mathrm{.}9.$

b$.211\mathrm{.}1.$

c$.134\mathrm{.}3.$

d$.68\mathrm{.}4.$