To find the slope of the line in the graph, we can use the formula for the slope $m$ between two points on the line:

$m = \frac{y_2 - y_1}{x_2 - x_1}$

From the graph:

1. Point 1: The line passes through (-9, -9).
2. Point 2: The line also passes through (-6, -6).

Calculate the slope:

$m = \frac{-6 - (-9)}{-6 - (-9)} = \frac{3}{3} = 1$

Thus, the slope of the line is $m = 1$.

Let me know if you'd like any more details or have questions!

Related questions:

1. What is the equation of the line in slope-intercept form $y = mx + b$?
2. How do you determine the y-intercept from the graph?
3. Can the slope be interpreted differently in real-world situations?
4. What does a slope of 0 indicate about a line?
5. How do negative slopes affect the direction of a line?

Tip: When finding the slope from a graph, always double-check the coordinates by choosing distinct points where the line crosses grid intersections.