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The Scatterplot of X and Y Are Shown as Below

Question 21

Multiple Choice

The scatterplot of X and Y are shown as below.
The scatterplot of X and Y are shown as below. Based on the plot, which model is the most appropriate to use? A) Y<sub>i</sub> = b<sub>1</sub>X<sub>i</sub> + a + e<sub>i</sub>. B) Y<sub>i</sub> = b<sub>1</sub>X<sub>i</sub> + b<sub>2</sub>X<sub>i</sub><sup>2</sup> + a + e<sub>i</sub>. C) Y<sub>i</sub> = b<sub>1</sub>X<sub>i</sub><sup>2</sup> + a + e<sub>i</sub>. D) Y<sub>i</sub> = b<sub>1</sub>X<sub>i</sub> + b<sub>2</sub>X<sub>i</sub> + b<sub>3</sub>X<sub>i</sub><sup>3</sup> + a + e<sub>i</sub>. Based on the plot, which model is the most appropriate to use?


A) Yi = b1Xi + a + ei.
B) Yi = b1Xi + b2Xi2 + a + ei.
C) Yi = b1Xi2 + a + ei.
D) Yi = b1Xi + b2Xi + b3Xi3 + a + ei.

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