For the given table we can see that for each hour distance increases 95 miles.
We can see 190-95 = 95
285 -190 =95
380 -285 =95.
Therefore, rate would be 95 miles per hour.
Speed is contant, therefore relationship between total distnace convered, time taken and rate would be
d = r t
We have rate = 95 miles per hour.
Therefore, equation would be
d=95t.
Let us plot points of the table on the graph.
And we will extand the line till t=7.
If train was travelling nonstop, the number of miles in 5.5 hours would be
d =95*5.5
d=522.5 miles.