The slope of a straight line is given by the following expression:
[tex]m=\frac{change\text{ in y }}{change\text{ in x}}=\frac{y_1-y_2}{x_1-x_2}[/tex]
By looking at the graph we have two locate two pairs of coordinates: Coordinate 1 (2,0) Coordinate 2 (-4,0).
Now we replace on the slope formula, having:
[tex]\begin{gathered} m=\frac{0-0}{2-(-4)} \\ m=0 \end{gathered}[/tex]
Pair of coordinates, coordinate 1 (2,0) coordinate 2 (3,2)
[tex]m=\frac{0-2}{2-3}=2[/tex]
