Final answer:
A vector created by someone pointing in a particular direction is a representation of magnitude and direction, illustrated as an arrow with the length corresponding to the magnitude and the pointed end indicating the direction.
Step-by-step explanation:
When somebody is pointing in a particular direction, they are essentially creating a vector. A vector is a mathematical representation of both magnitude and direction. These are often visualized as arrows, with the vector's tail representing the starting point and the head representing the end point. The length of the arrow indicates the magnitude, while the direction the arrow points indicates the vector's direction.
In one-dimensional motion, a vector's direction can be represented by a simple plus (+) or minus (–) sign, while in a two-dimensional plane, like in the example of a person pointing, it is typically given by an angle relative to a reference frame, often a horizontal line in Cartesian coordinates. The direction of a vector can also be expressed using compass points, such as North or West, and the precise direction can be described using degrees from these reference points.