What Is 1St Order Differential Equation

what is 1st order differential equation?

graph TB A["1st Order Differential Equation"] --> B["Definition"] A --> C["Examples"] A --> D["Applications"] B --> E["An equation involving the first derivative of a function but no higher derivatives"] C --> F["dy/dx = 2x"] C --> G["dy/dx + y = x"] D --> H["Physics: Newton's Second Law"] D --> I["Engineering: Circuit Analysis"]