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This regression uses the number of times a new worker has spent practicing task (measured in Number Practice~Rounds) to predict how much time is needed to complete one round of the task (measured in Minutes). What is the equation of the least-squares regression line? 
Overseas Competition->Knowledge Point->Calculation Modules
From Chapter 6, the correct answer is (d). The slope of the regression line, -0.6442, can be found under "Coef" to the right of "Number of Rounds" .The intercept of the regression line, 22.94, can be found under "Coef" to the right of "Constant." Rounds is the explanatory variable (x) and Time is the response variable (y). 