Answer
The equation defines $y$ is a function of $x$.
Work Step by Step
For an equation to be a function, it must satisfy the following requirement:
Every value of $x$ must correspond to exactly one value of $y$.
In this case it is true, because if we plug in any number in the place of $x$ the value of $y$ will be clear.
For example, for $x=2$, $\frac{3x-1}{x+2}=\frac{3(2)-1}{2+2}=\frac{5}{4}$, therefore $y$ can only have $\frac{5}{4}$ as a value if $x=2$.
