Direct VariationWhen two variable quantities have a constant (unchanged) ratio, their relationship is called a direct variation. It is said that one variable “varies directly” as the other.The constant ratio is called the constant of variation.The formul…

Direct VariationExamine the graph at the right:The linear equation graph at the right shows that as the x value increases, so does the y value increase for the coordinates that lie on this line . For instance, if x = 2, y = 4. If x = 6 (multiplied by 3),…