Is it possible to convert a line drawing to vector? In other words my line drawing is completely transparent - no fill.

I have tried doing it the way you would normally convert an image to vector by going path>Trace Bitmap but when I do that it changes the black line to grey and thickens the line. When I try to adjust the stroke width it won't allow me.

Is there a simpler way to do this or am I doing something wrong?

No worries just figured out how to do it. Under multiple scans needed to have the toggle on Brightness and not colours.