The correct answer is Choice A.
Substitute $x=1$, $x=2$, and $x=3$ into the given function $f(x)$ to find the corresponding values.
Choices B and C are incorrect because the corresponding values of $f(x)$ when $x=1$ and $x=3$ are wrong.
Choice D is incorrect because all of the corresponding values of $f(x)$ are wrong.
✨ Expert's Tip ✨
An alternate method is to plot the graph of the given function and then read the corresponding value of $y$ when $x=1$, $x=2$, and $x=3$.