The trend line $\hat { y }$ = 500 + 30t, (t = 1,2,3,.... ,20),and the seasonal indexes shown in the table below were computed from five years of quarterly sales data.Forecast the sales for the next four quarters.
$$\begin{array} { | c | c | }
\hline \text { Quarter } & \text { Seasanal Index } \
\hline 1 & 1.4 \
2 & 1.2 \
3 & 0.9 \
4 & 0.5 \
\hline
\end{array}$$

Question

The trend line $\hat { y }$ = 500 + 30t, (t = 1,2,3,.... ,20),and the seasonal indexes shown in the table below were computed from five years of quarterly sales data.Forecast the sales for the next four quarters.
 $$\begin{array} { | c | c | } 
\hline \text { Quarter } & \text { Seasanal Index } \
\hline 1 & 1.4 \
2 & 1.2 \
3 & 0.9 \
4 & 0.5 \
\hline
\end{array}$$

Quizplus · Accepted Answer

The Answer of The trend line $\hat { y }$ = 500 + 30t, (t = 1,2,3,.... ,20),and the seasonal indexes shown in the table below were computed from five years of quarterly sales data.Forecast the sales for the next four quarters.
 $$\begin{array} { | c | c | } 
\hline \text { Quarter } & \text { Seasanal Index } \
\hline 1 & 1.4 \
2 & 1.2 \
3 & 0.9 \
4 & 0.5 \
\hline
\end{array}$$

The Trend Line y^\hat { y }y^​ = 500 + 30t, (T = 1,2,3

The Trend Line $\hat { y }$ = 500 + 30t, (T = 1,2,3