You're analyzing data and trying to figure out how different variables are related - like how much ice cream sales increase (⬆️) when the temperature goes up (➡️), but also considering other factors that might go back and forth (↔️). That's basically the Regression Of Y On X in a nutshell. Use ⬆️➡️↔️ when you're geeking out over data and trying to find that perfect relationship between variables.