950 Mean of x 90 0 Regression Line 85 0 Mean ofY 75 0 70.0 650 60 0 350 50.0 15 0 20 0 25.0 30 0 35.0 40.0 450 50.0 50 10.0 X Reference: Ref 1 For point A we know: The standard unit (Z-score) for X is negative The standard unit (Z-score) for X is positive and for Y is negative The standard unit (Z-score) for Y is positive The standard unit (Z-score) for Y is positive and X is negative