According to the linear equation given, it is found that the volume of each marble is of 0.05 liters.
A linear equation is modeled by:
[tex]y = mx + b[/tex]
In which:
In this problem, the volume of water on a tank of 32 liters when n marbles are used is:
[tex]W = 32 - 0.05n[/tex]
The slope is of [tex]m = 0.05[/tex], which means that for each marble, there is 0.05 liters less available for water, meaning that the volume of each marble is of 0.05 liters.
You can learn more about linear equations at https://brainly.com/question/16302622