A straight section of a distance–time graph passes through the points shown in the table.
| Time in s\mathrm{s}s | Distance in m\mathrm{m}m |
|---|---|
| 2.0 | 6.0 |
| 8.0 | 30 |
What speed is represented by this section of the graph?
4.0 m/s4.0\ \mathrm{m/s}4.0 m/s
3.0 m/s3.0\ \mathrm{m/s}3.0 m/s
3.8 m/s3.8\ \mathrm{m/s}3.8 m/s
5.0 m/s5.0\ \mathrm{m/s}5.0 m/s