In the equation that measures friction for example the number that always stays the same is the coefficient. In essence you have the coefficient amounts of the variable. Note that if there is only one variable coefficient of x is the same as the numerical coefficient.
A numerical measure of a physical or chemical property that is constant for a system under specified conditions.
For example 4 is the coefficient in the term 4x and x is the coefficient in xa b. 5x 25. In mathematics a coefficient is a multiplicative factor in terms of a polynomial a series or any expression. For example x is the coefficient in the expression xa b and 3 is the coefficient in the term 3y.