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Correct! The production function describes the way in which the amount of output changes as the amount of labor is increased, given a fixed amount of capital. The marginal product of labor is the slope of this function, rise/run, the change in output (on the vertical axis) over the change in labor (on the horizontal axis).
Incorrect! The production function describes the way in which the amount of output changes as the amount of labor is increased, given a fixed amount of capital. The marginal product of labor is the slope of this function, rise/run, the change in output (on the vertical axis) over the change in labor (on the horizontal axis).