Given the following data, use least$-$squares regression to derive a trend equation:

The least$-$squares regression equation that shows the best relationship between demand and period is $($round your responses to two decimal places$)$:

hat$(y)=,+0\mathrm{.}80x$

where hat$(y)=$ Demand and $x=$ Period.

What is your estimate of the demand in period $7?$

Estimated demand in period $7$ is $($round your response to two decimal places$).$