In the fitted least squares equation, = 608.693.69 - 6.28x, the value of 6.28 indicates ____________. A. That Y increases by 6.28 units for each unit increase in X. B. That Y decreases by 6.28 units for each unit increase in X. C. That X decreases by 6.28 units for each unit increase in Y. D. That X increases by 6.28 units for each unit increase in Y