Plot 3D graph of electric potential of a charged particle

[AdrianMachin]

Homework Statement

Plot the electric potential $V(r)$ due to a positively charged particle located at the origin of an XY plane.

Homework Equations

$V=\frac 1 {4πε_0} \frac q r$

The Attempt at a Solution

I'm unfamiliar with 3D coordinates at this time, but I like to know how can I plot it using a computer program like Matlab or online tools like WolframAlpha or Mathpix. I'm looking for the formula that I can plug into a software to see the 3D plot, plus an explanation for how to derive that formula. In the attachment, you can see the plot from my textbook (Fundamentals of Physics), but I don't why it's written $V(r)$ where no axes are named $r$.

 

[Ray Vickson]

Homework Statement

Plot the electric potential $V(r)$ due to a positively charged particle located at the origin of an XY plane.

Homework Equations

$V=\frac 1 {4πε_0} \frac q r$

The Attempt at a Solution

I'm unfamiliar with 3D coordinates at this time, but I like to know how can I plot it using a computer program like Matlab or online tools like WolframAlpha or Mathpix. I'm looking for the formula that I can plug into a software to see the 3D plot, plus an explanation for how to derive that formula. In the attachment, you can see the plot from my textbook (Fundamentals of Physics), but I don't why it's written $V(r)$ where no axes are named $r$.

I don't have access to Matlab or Mathematica (I use Maple instead), but a simple Google search on the keywords '3d plots in MATLAB turns up several articles on the topic.