The "Y Variable" refers to the dependent variable in a statistical or mathematical model. It is the outcome that researchers aim to predict or explain based on changes in other variables, known as independent variables. In a simple linear regression, for example, the Y Variable is plotted on the vertical axis, while the independent variable is plotted on the horizontal axis. In experiments, the Y Variable is influenced by the manipulation of the independent variables. Understanding the relationship between the Y Variable and these independent variables helps researchers draw conclusions and make predictions. This concept is fundamental in fields like economics, psychology, and biology.