The table shows how irrigation of rice crops affects yield, where x represents the percent of total

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The table shows how irrigation of rice crops affects yield, where x represents the percent of total area that is irrigated and y is the rice yield in tons per hectare. (1 hectare ≈ 2.47 acres.)image



(a) Use least-squares regression to find a quadratic function that models the data. 


(b) Solve the equation f(x) = 3.7. Interpret the results.

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