Answer:
The constant of proportionality in the equation y = -49x is -49.
In a proportional relationship, the constant of proportionality represents the ratio between the values of the dependent variable (y) and the independent variable (x). It shows how the variables are related and helps us determine how much the dependent variable changes for each unit change in the independent variable.
In this equation, the constant of proportionality is -49, which means that for every unit increase in x, y decreases by 49 units. Similarly, for every unit decrease in x, y increases by 49 units. The negative sign indicates that y and x have an inverse relationship.