Answer
See Graph I
Work Step by Step
The complex number, $3 - 3i\sqrt{3}$, is shown in RED as a vector in Graph I.
Note that the absolute value of $3 - 3i\sqrt{3}$ is $\sqrt{3^2 + (-3\sqrt{3})^2} = 6$, the vertex of the vector will lie on the circle with radius = 6 and centre at the origin.
