The shape of the fitted quadratic model y_t = 248

Name: The shape of the fitted quadratic model y t = 248 - 84t + 2.4t 2 is declining, then rising.
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Question

The shape of the fitted quadratic model y_t = 248 - 84t + 2.4t² is declining, then rising.

Quizplus · Accepted Answer

The quadratic model has a negative coefficient (84) for the t term, indicating a downward slope, and a positive coefficient (2.4) for the t^2 term, indicating an upward curve. Therefore, the shape of the fitted model is declining, then rising.

The Shape of the Fitted Quadratic Model Yt = 248