Numbers on a complex plane

1. Jun 12, 2013

tg22542

1. The problem statement, all variables and given/known data

Graph the following numbers on a complex plane.

A) 3-2i
B)-4
C)-2+i
D)-3i
D)-1-4i

Can smomeone help me how to get started on this question? I'm not sure what it wants me to do

2. Jun 12, 2013

SteamKing

Staff Emeritus
First, find out what the complex plane looks like. (Hint: it looks just like a regular plane, except the y values are -4i, -3i, ..., 3i, 4i.

Plot A) thru B) from the OP and label the points.

Your work with complex numbers will get MUCH harder from this point.

3. Jun 12, 2013

HallsofIvy

Staff Emeritus
Do you know how to plot (3, -2) on a graph?

4. Jun 12, 2013

tg22542

So use an xaxis of -4i to 4i and a y axis of -1 to 3 then simply plot them?

5. Jun 12, 2013

Staff: Mentor

The instructions are pretty clear to me -
Have you looked in your book? It should have several examples of graphing complex numbers.

6. Jun 12, 2013

Mentallic

No, you have your axes the wrong way around. The x-axis corresponds to the real numbers, and the y-axis to the imaginary numbers. To plot a number $z = a+ib$, you plot (a,b) and you label your real axis (x-axis) as Re(z) and your imaginary axis as Im(z).

Also note that $a = a+i0$ and $ib=0+ib$