A proportional relationship can be represented by an equation in the form y = kx,
where k is the constant of proportionality. For the equation 2x = 18y, what is the
constant of proportionality?
A proportional relationship is a relationship between two quantities in which the ratio of one quantity to the other quantity is constant. A proportional relationship can be described by an equation of the form y = kx, where k is a number called the constant of proportionality.
