Let's now look at the relationship between total product and average product    O K the slope of a ray from the origin , alright, along the curve rises all the way to L 2 units , right, so the slope of the cord, ray rather, the slope of ray from the origin rises, right, to O 2 sorry to O L 2 units of labour  as a result the margin, sorry the average product of labour is also rising over that range .