The Number of New Central Air Conditioning Systems Installed by CoolBreeze

Essay

The number of new central air conditioning systems installed by CoolBreeze, Inc. in each of the last nine years is listed below.
​ $$\begin{array} { c c | c c | c c } \hline \text { Year } & \text { Jobs } & \text { Year } & \text { Job } & \text { Year } & \text { Jobs } \\\hline 1 & 353 & 4 & 374 & 7 & 399 \\2 & 387 & 5 & 396 & 8 & 412 \\3 & 342 & 6 & 409 & 9 & 408 \\\hline\end{array}$$ ​
Assuming a linear trend function, forecast the number of system installations CoolBreeze will perform in 10using linear trend regression.