Production and cost — Economics STD 12 Humanities & Commerce — Question

Definition : Total Variable Cost (TVC) refers to the costs that vary directly with the level of output.
Shape of the Curve : The TVC curve starts from the origin (0,0) because at zero output, variable cost is zero. It initially increases at a diminishing rate and later increases at an increasing rate due to the Law of Variable Proportions, giving it an inverse S-shape.