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? $$\begin{array} { c c c c } \text { Time period } & y _ { t } & \text { Time period } & y _ { t } \\\hline 1 & 5 & 5 & 50 \\2 & 8 & 6 & 85 \\3 & 14 & 7 & 135 \\4 & 25 & 8 & 190\end{array}$$ 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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