Was the term 'final' a misnomer for the Gryffindor-Slytherin match in Harry Potter and the Prisoner of Azkaban?
The Gryffindor-Slytherin match was referred to as the final in Prisoner of Azkaban. But was that the correct term to use? Wasn't it just one of six league matches?
Note
This isn't a duplicate of this question. 105
That assumes that the House Trophy consists of six league matches, while my question asks whether there is any canon evidence for the format, depending on which one could say if the word 'final' is applicable in the case mentioned above.
My thoughts
I think this can be answered if we can say definitively whether the House Trophy consisted of six(in the round robin system) or seven(six league matches plus a final) matches.
I find that evidence kind of points to the first possibility, as:
* The match in question was actually rescheduled, and was supposed to be the first match of the season.
* The House Trophy typically ends with a Gryffindor-Ravenclaw match, unlikely if the system had a final. Unlikely because Gryffindor's performances are usually not strong enough to make to the 'final' (if there was one), and the team's fate usually hangs in the balance before the last match. Plus, if there was a final, Gryffindor and Ravenclaw should have met before in the group stage, but no allusion is made to such a match.
* <PERSON> keeps telling <PERSON> to catch the <PERSON> only if they are more than fifty points up.1 That would be unnecessary if the match was a final as a final is a 'winner-takes-all' kind of match.
My question
Is there any definitive canon evidence for whether the Hogwarts House Trophy had a format consisting of six league matches plus a final**? Or did it consist of just six league matches?
That would help understand if it was right to call the Gryffindor-Slytherin match in Harry Potter and the Prisoner of Azkaban a final.
1 'So you must only catch it if we're more than fifty points up,' <PERSON> told <PERSON> constantly.
The Quidditch Final, Harry Potter and the Prisoner of Azkaban 899