Answer
The complex number is $-3i$=$0+(-3)i$, which is represented by the Blue line.
Conjugate is $+3i$, which is represented by the Red line.
Opposite is $+3i$ which is the same as the conjugate represented by the Red line.
Work Step by Step
The complex number is $-3i$=$0+(-3)i$, which is represented by the Blue line.
Conjugate is $+3i$, which is represented by the Red line.
Opposite is $+3i$ which is the same as the conjugate represented by the Red line.