To find the slope of the line that passes through the points \((-6, 5)\) and \((-3, 20)\), you can use the slope formula:
\[ m = \frac{y_2 - y_1}{x_2 - x_1} \]
Here, \((x_1, y_1) = (-6, 5)\) and \((x_2, y_2) = (-3, 20)\). Plugging in these values gives:
\[ m = \frac{20 - 5}{-3 - (-6)} \]
Calculating the differences in the numerator and denominator:
\[ m = \frac{15}{-3 + 6} \]
\[ m = \frac{15}{3} \]
Now, simplify:
\[ m = 5 \]
Thus, the slope of the line that passes through the points \((-6, 5)\) and \((-3, 20)\) is \(\boxed{5}\).