The results of a quadratic model fit to time series data were $\tilde { y } _ { t }$ = 7.5 - 0.25t + 3.5t²,where t = 1 for 2011.The forecasted value for 2018 is: A) 3.25 B) 10.75 C) 28.0 D) 229.5

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The forecasted value for 2018 is:$\tilde { y } _ { 2018 }$ = 7.5 + 0.25(2018 - 2011) + 3.5(2018 - 2011)²= 7.5 + 0.25(7) + 3.5(7)²= 7.5 + 1.75 + 171.5= 229.5

The Results of a Quadratic Model Fit to Time Series y~t\tilde { y } _ { t }y~​t​

The Results of a Quadratic Model Fit to Time Series $\tilde { y } _ { t }$