The formula of a slope m of a straight line is given as;
[tex]m=\frac{y_2-y_1}{x_2-x_1}[/tex]
Now, we will take any two convenient points on the graph;
[tex]\begin{gathered} point\text{ A(}0,-4) \\ \text{and point B(2, 2)} \end{gathered}[/tex][tex]undefined[/tex]
