Final answer:
The domain of the equation Y = -5x + 108 is All real numbers (R).
Step-by-step explanation:
The domain of the equation Y = -5x + 108 is (a) All real numbers (R).
The equation is a linear equation in the form y = mx + b, where x is the independent variable and y is the dependent variable. In this case, the coefficient of x is -5, which means that for any real value of x, there will be a corresponding value of y. Therefore, the domain is All real numbers (R).