To find the slope of the line given the points, we can use the formula for the slope \( m \):
\[ m = \frac{y_2 - y_1}{x_2 - x_1} \]
We can use any two points from the data provided. Let's use the points (1, 8) and (3, -6).
Here, \( (x_1, y_1) = (1, 8) \) and \( (x_2, y_2) = (3, -6) \).
Now, plug the values into the slope formula:
\[ m = \frac{-6 - 8}{3 - 1} = \frac{-14}{2} = -7 \]
Therefore, the slope of the line is \(\boxed{-7}\).