Question

How do you graph `-3>=n`?

Answer 1

Depends on the nature of `n` and the dimension of the graph.
See below

Explanation:

`-3>=n ->n in (-oo, -3]`

That is, n exists in the interval `(-oo, -3]`

To be able to represent `n` on a continuous graph I will assume that `n` is a real number. So now `n` can be represented as all points on the real line up to and including `-3`. Graphically, we can think of this as points on the `x-`axis `<=-3`

Next, to represent `n` on a 2D plane, we need to introduce an orthogonal axis (`y`) for which `n` exists for all values of `y`.

So, now we have `n =(x,y): n in RR; x in(-oo,-3]; y in(-oo,+oo)`

The shaded area on the graph below indicates the points for which `n` exists, with the assumptions above.

graph{-3>=x [-10, 10, -5, 5]}