Gradient Formula
\[
m_{AB} = \frac{\,y_2 - y_1\,}{\,x_2 - x_1\,}
\]
Example
Find the gradient of the line connecting points A(-5, 3) and B(2, 1).
\[
m_{AB} = \frac{\,y_2 - y_1\,}{\,x_2 - x_1\,}
\]
\[
= \frac{\,1 - 3\,}{\,2 - (-5)\,}
\]
\[
= \frac{-2}{7}
\]
\[
= -\frac{2}{7}
\]