To find the slope of the red line in the image, we can use two points from the line and apply the slope formula:

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

The points that can be easily identified from the graph are:

1. Point A: (0, 5)
2. Point B: (2, -3)

Using these points: $m = \frac{-3 - 5}{2 - 0} = \frac{-8}{2} = -4$

So, the slope of the line is -4.

Would you like more details or have any questions?

Here are some related questions:

1. How do we calculate the y-intercept from a graph?
2. What does the slope tell us about