http://www.webassign.net/scalcet7/4-3-006.gif
(a) On what intervals is f increasing? (Enter your answer using interval notation.)
b)On what intervals is f decreasing? (Enter your answer using interval notation.)
For a i have (2,4)
and for be I have (0,2)U(4,6) i just want to make sure its right

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the graph is for f'(x). f(x) increases when f'(x) is positive and decreases when it's negative.

are my answers correct?

no. you gave intervals where the derivative increases/decreases

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