The slope of the line passing through the points (4, -8) and (1, -5) is -1.
The slope of a line can be found using the formula:
slope = (y2 - y1) / (x2 - x1)
Given the coordinates of two points (x1, y1) and (x2, y2), we can substitute the values into the formula to find the slope.
In this case, the coordinates are (4, -8) and (1, -5). Plugging them into the formula, we have:
slope = (-5 - (-8)) / (1 - 4) = 3 / -3 = -1
Therefore, the slope of the line passing through the points (4, -8) and (1, -5) is -1.