1. Using the paired height/pulse data for males, we get the regression equation: y"L = 73.9 + 0 a. What does the symbol y" represent? b. For this example, which variable is the predictor variable and what does it represent? c. For this example, which variable is the response variable and what does it represent? y represents the predicted pulse rate. The predictor variable represents the height. It explains variations in the response variable; in an experimental study, it is manipulated by the researcher. The response variable represents the pulse rate. The response variable is also known as the dependent or outcome variable, its value is predicted or its variation is explained by the predictor variable; in an experimental study. this is the outcome that is measured following manipulation of the explanatory variable