Answer:
15
Step-by-step explanation:
The formula of a slope m :
[tex]m=\dfrac{y_2-y_1}{x_2-x_1}[/tex]
From the graph we have the points (0.2, 3) and (0.4, 6).
Substitute:
[tex]m=\dfrac{6-3}{0.4-0.2}=\dfrac{3}{0.2}=\dfrac{3\cdot10}{0.2\cdot10}=\dfrac{30}{2}=15[/tex]
