19: Prediction Share Tweet Share tumblr reddit Prediction # X Y 1 10 50 2 8 40 3 9 45 See Equation Above Y = 5(X) + 0 Y = 5(7) + 0 Y = 35 Note: the same formula can be used to predict a score on Test X using information from Test Y. Just make sure you plug your X and Y variables into the correct place in the formula.