To find the slope of the line that passes through the points (0, 1) and (3, -1), you can use the formula for the slope \( m \):
\[ m = \frac{y_2 - y_1}{x_2 - x_1} \]
Here, \((x_1, y_1) = (0, 1)\) and \((x_2, y_2) = (3, -1)\).
Now, plug in the coordinates:
\[ m = \frac{-1 - 1}{3 - 0} = \frac{-2}{3} \]
So, the slope of the line is \( -\frac{2}{3} \).