Hi guys! This video discusses two types of variations which is the joint and combined variation. Joint variation means that a dependent variable is directly proportional to two independent variables. Combined variation means that the dependent variable is directly proportional to one variable and inversely proportional to another independent variable. We will solve several examples about jointl and combined variations. Happy learning and enjoy watching! #enginerdmath #algebra #jointcombinedvariations Join this channel to get access to perks: /@enginerdmath