Question: Is this a function? Given the expression $$y = \frac{3x - 1}{x + 2}$$
1. **State the problem:** Determine if the relation $$y = \frac{3x - 1}{x + 2}$$ is a function.
2. **Recall the definition of a function:** A function assigns exactly one output $$y$$ for each input $$x$$.
3. **Analyze the given expression:** The expression is a rational function, which is a ratio of two polynomials.
4. **Check the domain:** The denominator $$x + 2$$ cannot be zero because division by zero is undefined.
So, $$x \neq -2$$.
5. **Check if for each valid $$x$$ there is exactly one $$y$$:** For every $$x \neq -2$$, the expression $$\frac{3x - 1}{x + 2}$$ produces exactly one value of $$y$$.
6. **Conclusion:** Since for every $$x$$ in the domain (all real numbers except $$-2$$) there is exactly one $$y$$, this relation is a function.
**Final answer:** Yes, $$y = \frac{3x - 1}{x + 2}$$ is a function.