Yes, the equation $y = 5x - 1$ is a function. Specifically, it's a linear function, because for every input $x$, there is exactly one output $y$.

Domain:

The domain of the function refers to all possible values of $x$. Since $y = 5x - 1$ is a linear equation, there are no restrictions on $x$; it can take any real number. Therefore, the domain is: $\text{Domain} = (-\infty, \infty)$

Range:

The range of the function refers to all possible values of $y$. As $x$ can take any real number, multiplying it by 5 and subtracting 1 will also produce any real number. Therefore, the range is: $\text{Range} = (-\infty, \infty)$

Would you like further details or have any questions?

Related questions:

1. What is the slope of the function $y = 5x - 1$?
2. How do you find the $y$-intercept of $y = 5x - 1$?
3. How would you graph the function $y = 5x - 1$?
4. What is the inverse of the function $y = 5x - 1$?
5. How does the function $y = 5x - 1$ compare to $y = 5x + 1$?

Tip: In a linear function, the coefficient of $x$ is the slope, and it tells you how steep the line is.