The Graph of the Derivative $f ^ { \prime } ( x )$

question 47

Multiple Choice

The graph of the derivative $f ^ { \prime } ( x )$ of a continuous function $\mathrm { f }$ is shown. On what intervals is $f$ decreasing?

• A) \(( 1,3 ) \cup ( 4,6 )\)
• B) \(( - 1,1 )\)
• C) \(( 8,9 )\)
• D) \(( 2,6 )\)
• E) None of these

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