Final answer:
Rory's winning score in the second round of the game would be represented by a positive number on the number line, indicating points above zero.
Step-by-step explanation:
If Rory joins the game for the second round and wins that round, we can say that his score would appear on the positive side of the number line.
Scores in games are usually represented with positive numbers when a player scores points.
Specifically, since he won the round, Rory's score would be above zero, for example, +1, +2, etc., depending on the scoring system of the game.