Answer:
Train A's unit rate is 67 km per hour.
Train B's unit rate is 75 km per hour.
Train B is faster than Train A
Step-by-step explanation:
Train A
Distance traveled by Train A is represented by :

where  represents distance traveled in kilometers and
 represents distance traveled in kilometers and  is the time in hours.
 is the time in hours.
To find the unit rate of Train A, we will plugin  and get the distance traveled by Train A in 1 hour which will be the unit rate of Train A in km/hr.
 and get the distance traveled by Train A in 1 hour which will be the unit rate of Train A in km/hr.


So, distance traveled by Train A in 1 hour = 67 km
∴ Train A's unit rate is 67 km per hour.
Train B
For Train B, we are given the table for the time in hours and distance traveled in that duration.
Taking time =2 hours the distance traveled by Train B= 75 km
To find distance traveled in 1 hour we apply unitary method.

So 
So, distance traveled by Train B in 1 hour = 75 km
∴ Train B's unit rate is 75 km per hour.
Difference in units rates = 
On comparing their unit rate i.e. the speed of the trains we find out that Train B is faster than Train A by 8 km/hr