👉 In mathematics, a stage is a mathematical concept used to describe an element or variable in a system of equations. It is like a point on a line graph where you can see how many values are needed to get from one point to another. For example, if there are three points A, B, and C that define the equation y = 2x + 3, then the stage would be defined as (A, B), since we're looking at three variables (A, B)
