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# Fig. 16.1. Measuring Average Product on a Total Production Function Curve The image shows a graph with total product on the y-axis and labour on the x-axis. A curve TP represents the total product curve and the inflection point is labeled. The total product curve starts from the origin with the fo...

# Fig. 16.1. Measuring Average Product on a Total Production Function Curve The image shows a graph with total product on the y-axis and labour on the x-axis. A curve TP represents the total product curve and the inflection point is labeled. The total product curve starts from the origin with the following features: * When $OL_1$ units of labour are employed, total product is equal to $L_1A$ and therefore average product of labour equals $\frac{L_1A}{OL_1}$ which would give us average product to be equal to $\frac{L_1B}{OL_2}$ or the slope of the ray $OB$. * When $OL_3$ units of labour are employed, the average product will be measured by the slope of the ray OC. # Fig. 16.2. Measuring Marginal Physical Product of Labour The image shows a graph with the total physical product on the y-axis and labour on the x-axis. The curve TP represents the total physical product curve and it shows the inflection point It also demonstrates the following: * Labour increases to $\Delta L$ units, and, the marginal physical product of labour is given by: $\frac{\Delta Q}{\Delta L}$. * The marginal physical product curve derived from of total physical product curve of labour * At any level of employment of labour, the marginal product of labour can be obtained by measuring the slope of the total production curve at a given level of labour employment.