Answer:
Total product curve
Step-by-step explanation:
The total product curve is a plot that shows the different level of outputs that can be obtained from a variable factor of production whilst keeping other factors of production constant.
What the total product curve shows is that, it shows how the production output level varies with a particular variable factor of production while we keep other factors of production constant. Hence it is used to study the effect a variable production factor has on output with other production factors at a constant value