Direct Variation - ChiliMath
www.chilimath.com › direct-variationTo write the equation of direct variation, we replace the letter k by the number 2 in the equation y = kx. When an equation that represents direct variation is graphed in the Cartesian Plane, it is always a straight line passing through the origin. Think of it as the Slope-Intercept Form of a line written as y = mx + b where b = 0