To calculate the slope of the line based on the two points \((-4, 5)\) and \((8, -1)\), we can use the slope formula:
\[ m = \frac{y_2 - y_1}{x_2 - x_1} \]
where \((x_1, y_1) = (-4, 5)\) and \((x_2, y_2) = (8, -1)\).
Plugging in the values:
\[ m = \frac{-1 - 5}{8 - (-4)} \]
Calculating the values:
\[ m = \frac{-6}{8 + 4} \] \[ m = \frac{-6}{12} \]
Now, simplifying the fraction:
\[ m = \frac{-1}{2} \]
Thus, the slope of the line is \(\frac{-1}{2}\).