Well, you can find the equation using the two points that are given: (4,1) and (0,3). The answer should probably be in slope intercept form: y=mx+b. M is the slope and b is the y intercept. The first step is to find the slope which is y1-y2 over x1-x2. This would equal 2. Since we already know the y intercept, we just plug it in. y=2x+3
If the train travels 744 miles in 3 hours then to determine the unit rate the train is traveling per hour you have to divide the miles by the hours, in this case (744 miles)/(3 hours). The final result concludes as 248 miles per hour.
