The following trend line and seasonal indexes were computed from five years of quarterly observations:
ŷt = 1800 + 75t - 2 t2 $$\begin{array} { | c c | }
\hline \text { Quarter } & S I _ { t } \
\hline 1 & 0.575 \
2 & 0.825 \
3 & 1.225 \
4 & 1.375 \
\hline
\end{array}$$ Forecast the four quarterly values for next year.

Question

The following trend line and seasonal indexes were computed from five years of quarterly observations:
ŷt = 1800 + 75t - 2 t2 $$\begin{array} { | c c | } 
\hline \text { Quarter } & S I _ { t } \
\hline 1 & 0.575 \
2 & 0.825 \
3 & 1.225 \
4 & 1.375 \
\hline
\end{array}$$ Forecast the four quarterly values for next year.

Quizplus · Accepted Answer

The Answer of The following trend line and seasonal indexes were computed from five years of quarterly observations:
ŷt = 1800 + 75t - 2 t2 $$\begin{array} { | c c | } 
\hline \text { Quarter } & S I _ { t } \
\hline 1 & 0.575 \
2 & 0.825 \
3 & 1.225 \
4 & 1.375 \
\hline
\end{array}$$ Forecast the four quarterly values for next year.

The Following Trend Line and Seasonal Indexes Were Computed from Five