To find the rate of change we need to use 2 pairs of values. In this case, time will be represented by x and distance will be represented by y, then, the rate of change is found using the following formula:
[tex]m=\frac{y2-y1}{x2-x1}[/tex]
Use 2 pairs of values, for example (4, 260) and (6, 390):
[tex]\begin{gathered} m=\frac{390-260}{6-4} \\ m=\frac{130}{2} \\ m=65 \end{gathered}[/tex]
The rate of change is 65 miles/hour.
In this case, the rate of change represents the speed.
