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15 December, 20:40

The number of cases of a new disease may be modeled by the quadratic regression equation y=-2x^2+40x+8. Which of the following is the best prediction for the number of cases after 15 years?

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  1. 15 December, 20:42
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    By plugging x=15, we can write that y=-2*225+40*15+8=-450+600+8=158. So that, 158 is going to be the final answer to this problem.
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