Answer
The function is odd.
Work Step by Step
The given function is
$\Rightarrow f(x)=5x$
Substitute $-x$ for $x$.
$\Rightarrow f(-x)=5(-x)$
Simplify.
$\Rightarrow f(-x)=-5x$
Because $f(-x)=-f(x)$, the function is odd.
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