Khan/khan-exercises — Issue #12288: Shifting and reflecting functions - Wrong answer
Author: KhanBugz
Created: 2012-01-27 17:10:42+00:00
State: open
Labels: firefox, lion, wrong-or-unclear

Reporter: jratshin@everestphs.org

On several problems in this section, the correct answer is not even one of the possible solutions. For instance, this graph reflects across the a-axis, shifts to the right 5 spaces, and shifts down 15 spaces. The answer should be g(x) = -f(x-5)-15. The possible solutions are -f(x-5)+1, -f(x+5)-1, f(x-5)-1, and -f(x+5)+1 (and none of the above). On many of the problems, putting in the solution that is closest to the real thing does not even get you credit. So, the answers are most often wrong, in addition, there is no way to predict what the correct solution will be.

[shifting_and_reflecting_functions.html?seed=88&problem=0](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/shifting_and_reflecting_functions.html?seed=88&problem=0&debug)

[Answer timeline](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/shifting_and_reflecting_functions.html?seed=88&problem=0&debug&activity=%5B%5D)

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