The slope of the line that passes through the points (x1, y1) and (x2,y2) is computed as follows:
[tex]m=\frac{y_2-y_1}{x_2-x_1}[/tex]In this case, the points are (4, 0) and (6, 2), then the slope of the line is:
[tex]m=\frac{2-0}{6-4}=\frac{2}{2}=1[/tex]