The Linear Trend Equation for the Following Data Is $$\hat { y } = 1.4286 + 2.5 ( t )$$

Essay

The linear trend equation for the following data is $$\hat { y } = 1.4286 + 2.5 ( t )$$ $$\begin{array} { c c } \text { Month } & \text { Value of Fund } \\1 & 4 \\2 & 6 \\3 & 9 \\4 & 12 \\5 & 14 \\6 & 16 \\7 & 19\end{array}$$
-Find the forecast errors for period 3,and period 7.