National Scan, Inc., sells radio frequency inventory tags. Monthly sales for a seven

$-$

month period were as follows:

$$

Month Sales

$($

$0$

$0$

$0$

$)$

Units

Feb.

$1$

$8$

Mar.

$2$

$1$

Apr.

$1$

$5$

May.

$2$

$3$

Jun.

$2$

$0$

Jul.

$2$

$6$

Aug.

$2$

$3$

$$

b

$.$

$$Forecast September sales volume using each of the following:

$$

$($

$1$

$)$

$$A linear trend equation.

$($

Round your intermediate calculations and final answer to

$2$

$$decimal places.

$)$

$$

Yt

$$ thousands