describes a unit which has both and . The most common notations for vectors are to put an arrow over a letter or to make the letter bold.
Graphically, a vector is usually represented by an arrow where the length of the arrow represents the magnitude and the arrowhead represents its direction.
Vectors are drawn between two points, the initial point and the terminal point. For example, if a vector is drawn between
it can be named
depending on the initial point and terminal point.
A vector can also be written in . In , this is Here, the first coordinate is the horizontal change and the second coordinate is the vertical change.
In the case of a vector in a space, the component form is Here, the coordinates represent the change in the direction of their corresponding axes.