A forecasting method has produced the following results.

Which forecasting model do you believe was used?

Question $6$Answer

a$.$

A Moving average of order $3$ i$.$e$.$ a MA$(3)$

b$.$

A Moving average of order $4$ i$.$e$.$ a MA$(4)$

c$.$

An exponential smoothed model using an alpha $($smoothing parameter$)$ of $0\mathrm{.}2$

d$.$

A linear trend model of the order Y $=9\mathrm{.}7646+0\mathrm{.}1476$T based on data from t$=1$ to t$=8$