#### Answer

$(3, +\infty)$

#### Work Step by Step

The graph is falling from $x=3$ to the right.
Thus, the function is decreasing in the interval $(3, +\infty)$.
Therefore, the largest open interval where the function decreases is $(3, +\infty)$.

Published by
Pearson

ISBN 10:
013421742X

ISBN 13:
978-0-13421-742-0

$(3, +\infty)$

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