Variable

Variable 

Cause - Effect

Independent Variable To Dependent Variable

Poverty To Shorter Longevity

Extraneous Variables are Confounders

Poverty To Prosperity can affect Longevity

Variables

Independent and Dependent Variables To Controlled Variables

Independent Variable (Manipulated Variable)

Dependent Variable (Data: Measure and Observe)

Controlled Variable (What i keep the same after measured data)

Example: 1 

Independent Variable To Dependent Variable

What i change To What i observe

Controlled Variable: After Observatiom

Controlled Variable: What i keep the same 

Example: 2 

Independent- Dependent- Controlled

Example 3 

Controlled variables only can minimize expenses

Variable (Snap Shot)