The formula to find the slope $m$ of a line passing through two points $(x_1, y_1)$ and $(x_2, y_2)$ is:

$m = \frac{y_2 - y_1}{x_2 - x_1}$

Given points:

• $(x_1, y_1) = (8, 6)$
• $(x_2, y_2) = (1, 9)$

Substitute the values into the formula:

$m = \frac{9 - 6}{1 - 8} = \frac{3}{-7} = -\frac{3}{7}$

So, the slope of the line is $-\frac{3}{7}$.

Would you like more help with slope or related topics? Here are some related questions:

1. How do you find the equation of a line given two points?
2. What is the slope of a horizontal line?
3. What is the slope of a vertical line?
4. How do you find the y-intercept of a line given a point and slope?
5. How do you interpret the slope in real-world problems?

Tip: A negative slope means the line goes down as you move from left to right.