To determine the slope of a line parallel to the given line, we first examine the equation provided:

$y = 9x + 2$

In the equation $y = mx + b$, $m$ represents the slope. Here, $m = 9$, so the slope of this line is 9.

Since parallel lines have the same slope, a line parallel to $y = 9x + 2$ will also have a slope of 9.

Would you like further details on this concept, or do you have any questions?

Here are some related questions to consider:

1. What would be the slope of a line perpendicular to $y = 9x + 2$?
2. How can you find the slope if the equation is given in a different form, like $2x - y = 3$?
3. What effect does changing the $b$ value (the y-intercept) have on parallel lines?
4. How do you find the equation of a line parallel to $y = 9x + 2$ that passes through a specific point?
5. Can two lines with different slopes ever be parallel?

Tip: Remember, for two lines to be parallel, they must have the same slope but can have different y-intercepts.