What is the inverse of y = 3

What is the inverse of this function? How do I graph this and it's inverse?

The inverse of a function means interchange y with x and x with y.

So y = 3 is the original function, the inverse function changes y with x.

x = 3 becomes the inverse function. The graph is just a vertical line passing through 3 on the x-axis.

The graph of y = 3 is a horizontal line passing through (0, 3).
y = 3 is many-to-one so it does not have an inverse.