A contour map is given for a function f. Use it to estimate fx(2, 1) and fy(2, 1).?

NetherCraft 0

It wouldn’t let me upload the file. Here’s the graph. I can’t figure this out for the life of me. Finished all the crazy partial derivative homework problems and I don’t get this simple problem…

Thank you for any assistance!


The funny part is, I’ve tried those answer on WebAssign and it said they were incorrect LOL! Maybe the teach was asking for fx(1, 2) and fy(2, 1)? No idea!

1 Answer

  • What could be easier provided an approximation will do?: fx(2,1) ≈ 3 and fy(2, 1) ≈ -2.

    Although it doesn’t happen to affect either the question or its answer, there is a major fault on this “map”. In the region (1, 3) there os no contour between levels 0 and 6. This is impossible!

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