the constant value of the ratio of two proportional quantities x and y; usually written y = kx, where k is the factor of proportionality

a ratio of two quantities that is constant

harmonious arrangement or relation of parts or elements within a whole (as in a design)

anything that contributes causally to a result

an abstract part of something

one of two or more integers that can be exactly divided into another integer

resolve into factors

a businessman who buys or sells for another in exchange for a commission