Khan/khan-exercises — Issue #4122: Algebra challenge - Can this be correct???
Author: KhanBugz
Created: 2011-10-10 22:11:19+00:00
State: open
Labels: firefox, xp

Reporter: jdyaho@yahoo.com

Problem on algebra challenge says the inverse of f(x)=-x-4 is also -x-4, but the drawing with the hints shows the inverse to be y=x... a line with slope of 1 going through the origin. Is the answer wrong?

[algebra_challenge.html?seed=83&problem=12 (inverses_of_functions)](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/algebra_challenge.html?seed=83&problem=12)

["None of the above.","x-4","-x+4","-x-4"]

Mozilla/5.0 (Windows NT 5.1; rv:7.0.1) Gecko/20100101 Firefox/7.0.1

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