Okay,now that result holds, right, for all erm for all marginal relationships  Okay, so if we are looking at a marginal  marginal cost curve , right, we have got that's our marginal cost , that's our average cost we, we're intersecting here when in the case it is a minimum   so marginal costs cuts through average costs at its minimum value  we are looking at average revenue and marginal revenue   average revenue function marginal revenue function   This is  our total revenue function   and the same relationship is embodied there, but, notice that between the average and the average revenue and marginal revenue functions, right, don't intersect  simply because we have got a linear relationship here  right, average revenue is always above marginal revenue in this particular case.