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Suppose you obtain the following regression model, E[y]=23+66*x +28*x^2. What is the impact ofa 43unit change of x on the expected value of y when

Suppose you obtain the following regression model, E[y]=23+66*x +28*x^2. What is the impact ofa 43unit change of x on the expected value of y when x is at its mean of 44?

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