Final answer:
The equation y = 9x + 1/2 represents a linear relationship between the variables y and x and is proportional.
Step-by-step explanation:
The equation y = 9x + 1/2 represents a linear relationship between the variables y and x. In a linear relationship, a change in one variable results in a proportional change in the other variable. To determine if the equation is proportional, we can compare the changes in y and x. For example, if x increases by 1, y would increase by 9. This constant rate of change indicates that the equation is proportional.