What is a value you put into A formula or equation?

A value put into a formula or equation is known as a variable or constant, which represents a specific quantity. Variables can change or vary, while constants have a fixed value. For example, in the equation (y = mx + b), (m) and (b) are constants, and (x) is a variable that can take on different values to determine the corresponding (y). This allows for the calculation of outcomes based on different inputs.