Given:
There are given the graph to find the slope:
Explanation:
To find the slope, we need to select two intersecting points.
So,
The two points are:
[tex](2,30),(4,60)[/tex]Now,
From the formula to find the slope:
[tex]m=\frac{y_2-y_1}{x_2-x_1}[/tex]Then,
[tex]\begin{gathered} m=\frac{y_{2}-y_{1}}{x_{2}-x_{1}} \\ m=\frac{60-30}{4-2} \\ m=\frac{30}{2} \\ m=15 \end{gathered}[/tex]So,
The slope of the given line is 15.
Final answer:
Hence, the correct option is D.