Final answer:
The slope of the line passing through the points (1,4) and (-1,-1) is 2.5.
Step-by-step explanation:
To calculate the slope of the line passing through the two points (1,4) and (-1,-1), we can use the formula: m = (y2 - y1) / (x2 - x1).
Substituting the values, we get: m = (-1 - 4) / (-1 - 1) = -5 / -2 = 5/2. Therefore, the slope of the line is 5/2, which is equivalent to 2.5.