The authors of the article “Influence of Temperature and Salinity on Development of Whit...

The authors of the article “Influence of Temperature and Salinity on Development of White Perch Eggs” (Transactions of the American Fisheries Society [1982]: 396– 398) used a quadratic regression model to describe the relationship between y = percentage hatch of white perch eggs and x water temperature (°C). The estimated regression equation was given as

a. Graph the curve corresponding to this equation by plotting the (x, y) pairs using x values of 10, 12, 14, 16, 18, 20, 22, and 24 (these are the temperatures used in the article). Draw a smooth curve through the points in your plot.

b. The authors make the claim that the optimal temperature for hatch is 14°C. Based on your graph in Part (a), does this statement seem reasonable? Explain.