The magnification of a convex mirror is always positive and greater than zero, which is determined by the negative focal length. The size of the magnification does depend on the object distance, as demonstrated through ray diagrams showing different image sizes for the same object at varying distances. The relationship for magnification can be derived from the formula 1/u + 1/v = 1/f, with magnification defined as M = -v/u. It is confirmed that the magnification for a convex mirror cannot equal 1; it can only be greater than 1. Understanding these principles is essential for analyzing convex mirrors effectively.