To determine which freight train is traveling at a faster speed, we would need to analyze the distances traveled by each train over the same time intervals. Typically, if the distances and times are provided in a table or graph, we can calculate the speed for each train by using the formula:
\[ \text{Speed} = \frac{\text{Distance}}{\text{Time}} \]
If the data shows the distance covered by each train at specific time intervals, you can calculate the speed for each one and compare the results.
If you have specific distance values from the table or graph for the coal and grain trains corresponding to the same time intervals, please share them so I can help you calculate and compare their speeds. Without that information, I can't definitively say which freight train is traveling faster.
Given your options, if there is data available that shows different speeds, you would choose the option accordingly. If not enough information is provided, the last option ("There is not enough information to determine the speeds of the trains.") would be the correct response.