Answer:
Phasor
Step-by-step explanation:
A phasor is usually referred to as a rotating vector which has scaled lines. A vector quantity is one which has both magnitude and direction.
Since a phasor is also a vector quantity it has the magnitude and direction in the form of quantity and displacement. The quantity and displacement are usually measured in a counterclockwise direction.
Phasors is used in the engineering world to establish relationships between AC quantities and the parameters such as current and voltage etc.