Any vector can be expressed as a vector sum of its x- and -y components, as follows:
v = vₓ* x + vy* y
where vₓ = x- component, x= unit vector in the x direction, vy = y-component, y = unit vector in the y direction.
If we add the components graphically, using the head-to-tail method, it will be defined a right triangle, being the vector sum of both components (the vector itself) the hypotenuse of the triangle.
As both components are perpendicular, they will be always lined up with the x- and y- axes.
