For two points $A(x_1,y_1)$ and $B(x_2,y_2)$, the slope of the line passing through $A$ and $B$ is
\begin{equation*}
m_{AB} = \frac{y_2-y_1}{x_2-x_1}
\end{equation*}
Resources for HKDSE Mathematics
Resources for HKDSE Mathematics
For two points $A(x_1,y_1)$ and $B(x_2,y_2)$, the slope of the line passing through $A$ and $B$ is
\begin{equation*}
m_{AB} = \frac{y_2-y_1}{x_2-x_1}
\end{equation*}
