You run a regression in Excel to help you forecast labor requirements, where $x($Sales$)$ and $Y($Headcount$).$

In the Excel output the slope $=\mathrm{.}8$ and the $y-$intercept $=\mathrm{.}5.$

How many workers would be needed if you expect $7($million$)$ in sales?

$[Y$ is entered in the regression input data in $\text{'}000$s$,$ e$.$g$.,1=1,000]$

$5,100$

cannot be determined

$6,100$

$5,600$