How do you find the slope of the line passing through the points A (3,9), B(1,5)?

Apr 12, 2016

Slope = $2$

Explanation:

$A \left(3 , 9\right) = \left({x}_{1} , {y}_{1}\right)$

$B \left(1 , 5\right) = \left({x}_{2} , {y}_{2}\right)$

$S l o p e = \frac{{y}_{1} - {y}_{2}}{{x}_{1} - {x}_{2}}$

$= \frac{9 - 5}{3 - 1}$

$= \frac{4}{2} = 2$