what is the constant of proportionality in the equation?
k is a constant. It is called the âconstant of proportionality , or âconstant of variationâ. Both terms mean the same thing. The terms are interchangeable. The constant of proportionality means that DIVIDING the DISTANCE by the TIME is a CONSTANT value (k, the constant of variation). To solve for k, divide each side of the equation by the variable time: