The graph of $y=f(x)$ is shown, where the function $f$ is defined by $f(x)=ax^{3}+bx^{2}+cx+d$ and $a$, $b$, $c$, and $d$ are constants. For how many values of $x$ does $f(x)=0$?
Difficulty: Medium
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The graph of $y=f(x)$ is shown, where the function $f$ is defined by $f(x)=ax^{3}+bx^{2}+cx+d$ and $a$, $b$, $c$, and $d$ are constants. For how many values of $x$ does $f(x)=0$?