Step 1
Find the equation of the line.
First, pick two points.
(2.5, 100) and (5, 200)
Step 2
Find the slope
[tex]\begin{gathered} \text{Slope m = }\frac{y_2-y_1}{x_2-x_1} \\ m\text{ = }\frac{200\text{ - 100}}{5\text{ - 2.5}} \\ m\text{ = }\frac{100}{2.5} \\ m\text{ = 40} \\ i\text{ntercept c = 0} \\ \text{The equation of a line is:} \\ y\text{ = mx + c} \\ y\text{ = 40x} \end{gathered}[/tex]
y represent distance and x represent time
The distance traveled after 15 hours = 40 x 15 = 600
