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A Plot the Following Time Series B Use the Regression Technique to Calculate the Linear Trend

question 94

Essay

a. Plot the following time series. Would the linear or quadratic model fit better?  Time period yt Time period yt155502868531471354258190\begin{array} { c c c c } \text { Time period } & y _ { t } & \text { Time period } & y _ { t } \\\hline 1 & 5 & 5 & 50 \\2 & 8 & 6 & 85 \\3 & 14 & 7 & 135 \\4 & 25 & 8 & 190\end{array} b. Use the regression technique to calculate the linear trend line and the quadratic trend line.
c. Which line fits better?


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