3. The point, \( (O, O) \), also called the \( x \)-axis and the \( y \)-axis intersect.

The point \( (O, O) \) is commonly known as the origin on a Cartesian plane, and it's where both the \( x \)-axis and the \( y \)-axis meet. This point is crucial in the coordinate system as it serves as a reference for measuring distances and defining locations of other points in relation to it. In essence, every point on the grid can be expressed as a distance from this central point! When you're graphing equations or functions, remember that understanding the role of the origin is key! It helps establish quadrants and provides a basis for transformations. Common mistakes include confusing coordinates and neglecting to consider the origin's influence on symmetry and sign changes as you move in different directions across the axes.