- A transformation \(T\) from the \(z\)-plane to the \(w\)-plane is given by
$$w = \frac { z + 2 \mathrm { i } } { \mathrm { i } z } \quad z \neq 0$$
The transformation maps points on the real axis in the \(z\)-plane onto a line in the \(w\)-plane.
Find an equation of this line.