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 6 players, a total of 15 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

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

Step2: Assign given values

Given $x=6$, $N=15$.

Step3: Form ordered pair

Ordered pair is $(x, N)$.

Answer:

$(6, 15)$