Question

show how a total product curve for an input can be derived from an isoquant map.

Answer 1

These sites may help you.

http://en.wikipedia.org/wiki/Isoquant

http://www.lmu.ac.uk/lbs/epia/people/beachill/micro1/mic1top6.doc

Answer 2

This website seems to deal with that question:
http://72.14.253.104/search?q=cache:OX_R_zHSVd0J:www.ssc.wisc.edu/~snavarro/Econ_301/LECTURES/Chapter7.pdf+%22product+curve%22+isoquant+map%22&hl=en&ct=clnk&cd=4&gl=us&ie=UTF-8

It is not a subject I am familiar with, it looks like it would require graphic capabilities that Jiskha does not have.

Answer 3

This pdf version of my previous recommended website has better graphics:
http://www.ssc.wisc.edu/~snavarro/Econ_301/LECTURES/Chapter7.pdf