Plot the complex number $z=-i$ on the graph below.

• A.
• B.
• C.
• D.

Answer: (C)

Verified step by step guidance

1. Understand that a complex number is represented as z = a + bi, where a is the real part and b is the imaginary part.
2. For the complex number z = -i, identify the real part a = 0 and the imaginary part b = -1.
3. Locate the point on the complex plane where the real axis (Re) is 0 and the imaginary axis (Im) is -1.
4. On the graph, the horizontal axis represents the real part, and the vertical axis represents the imaginary part.
5. Plot the point at the intersection of Re = 0 and Im = -1, which is directly on the negative side of the imaginary axis.