The residual is defined as the difference between:
A. the actual value of x and the estimated value of x
B. the actual value of y and the estimated value of y
C. the actual value of y and the estimated value of x
D. the actual value of x and the estimated value of y

Which of the following statistics and procedures can be used to determine whether a linear model should be employed?
A. The t-test of the slope
B. The standard error of estimate
C. The coefficient of determination
D. All of the above answers are correct