Question

in a round - robin chess tournament, each player is paired with every other player once. the function, shown below, models the number of chess games, n, that must be played in a round - robin tournament with x chess players. in a round - robin chess tournament with 12 players, a total of 66 games were played. use this information to identify a point on the graph.\\(n=\frac{x^{2}-x}{2}\\)\
the point on the graph is \\(\square\\). (type an ordered pair.)

Explanation:

Step1: Define variables

Here, $x$ = number of players, $N$ = number of games.

Step2: Match given values to variables

Given $x=12$ players, $N=66$ games.

Step3: Form ordered pair

Ordered pairs for the graph follow $(x, N)$.

Answer:

$(12, 66)$