Representation of vectors (Symbolic representation of a vector):

To differentiate a vector from a scalar quantity we generally use bold letters to represent vector quantities, such as F, a, d, or a bar or arrow over their symbols such as

$\bar{F},\bar{a},\bar{d}$ or $\overrightarrow{a}$ and $\overrightarrow{d}$

Vector representation/Graphical representation of a vector:

A straight line is drawn with an arrowhead at one end. According to some suitable scale, the length of the line represents the magnitude and the arrowhead gives the direction of the vector.