Questions & Answers about Var är bagaget? Det ligger i baksätet.
Why do we use var here instead of vart?
Var asks about a fixed position (where at), while vart asks about direction or movement (where to). Since we are asking where the luggage is resting, and not where it is traveling to, we use var.
Could I just say Det är i baksätet instead of Det ligger i baksätet?
You can use är (is), but Swedish strongly prefers positional verbs like ligger (lies), står (stands), or sitter (sits) to describe how an object is placed in a space. Since luggage usually rests flat on a surface, ligger is the most natural choice here.
Why do we refer to the luggage as det instead of den?
The pronoun must match the grammatical gender of the noun. Bagage is an ett-word (ett bagage, making the definite form bagaget). Because of this, we must use det (it) to refer back to it.
What dictates the definite ending on baksätet?