What is the general shape of AP curve ?

Dear Student, 

The AP curve is inverted-U shaped.
It rises (due to increasing marginal returns), reaches its maximum, and then begins to fall (due to decreasing marginal returns). 


​​The AP curve slopes upwards as long as the MP curve is above it.
AP reaches its maximum point when AP=MP. 
After that point, AP starts falling. This can be attributed to falling MP.

Regards

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The AP curve also shows a similar trend as the MP. It rises, reaches its maximum and then falls. At the point where AP reaches its maximum, AP = MP. All ? TP, MP and AP curves, are inverted U-shaped.
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Image result for shape of average product curve
The AP curve also shows a similar trend as the MP. It rises, reaches its maximumand then falls. At the point where AP reaches its maximum, AP = MP. All – TP, MP and AP curves, are inverted U-shaped.
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