Final answer:
The domain of the equation is all real numbers, and the range is limited because the parabola opens downwards.
Step-by-step explanation:
The domain of a quadratic equation is the set of all possible x-values, while the range is the set of all possible y-values. In the given equation, y = -2/120x^2 + 1x + 13.5, the domain is all real numbers, because there are no restrictions on the x-values. However, the range is limited because the coefficient of the x^2 term is negative, which means the parabola opens downwards. This means that the maximum value of y occurs at the vertex, and the y-values will decrease as x increases or decreases indefinitely.