To create the equation for the total cost that Giovanni spent, we can break down his expenses:
- The cost of renting the bowling shoes is $2.50.
- He bowled 3 games, and we want to represent the cost of each game with the variable \( g \).
The total cost can be represented as the sum of the cost of the shoe rental and the total cost of the games. Since he played 3 games, the cost for the games would be \( 3g \).
Thus, the equation for the total cost is:
\[ 2.50 + 3g = 13.75 \]
This equation can be used to determine \( g \), the cost in dollars of each bowling game.