Final answer:
The constant of proportionality in the equation y = 5.5x is 5.5. This constant indicates that y changes at a rate of 5.5 times for each unit change in x.
Step-by-step explanation:
The equation y = 5.5x represents a proportional relationship. In this equation, y varies directly as x
The constant of proportionality is the constant factor by which the two variables are related. In the given equation, for every unit increase in x, y increases by 5.5. Therefore, the constant of proportionality is 5.5.
To clarify, the constant of proportionality is the multiplier that relates the dependent variable to the independent variable in a direct proportion. It represents the consistent rate of change between two directly related quantities. In this case, as x changes, y changes at a rate of 5.5 times the change in x.