The only true proportion regarding the data transfer rate time of Device D compared to other devices is C) Time for Device D/Time for Device C = 1/2.
To determine which proportion for the data transfer rate of Device D compared to other devices is true, we need to find the ratios of the time it takes to transfer a 1 GB file between Device D and the other devices. The time for Device D is 20 seconds, for Device A is 25 seconds, for Device B is 35 seconds, and for Device C is 40 seconds.
A) Time for Device D/Time for Device A = 20/25 = 4/5 (Not 1/2)
B) Time for Device D/Time for Device B = 20/35 = 4/7 (Not 2/7)
C) Time for Device D/Time for Device C = 20/40 = 1/2 (True)
D) Time for Device D/Time for Device B = 20/35 = 4/7 (Not 1/3)
After evaluating each proportion, the correct answer is C) Time for Device D/Time for Device C = 1/2.
The probable question may be:
In a network of computers, the data transfer rates were measured between various devices. The table below shows the time it takes (in seconds) for each device to transfer a 1 GB file.
Device | Time (seconds)
---------------------------
Device A | 25
Device B | 35
Device C | 40
Device D | 20
Which of the following proportions is true for the time it takes for Device D compared to the other devices?
A) Time for Device D/Time for Device A = 1/2
B) Time for Device D/Time for Device B = 2/7
C) Time for Device D/Time for Device C = 1/2
D) Time for Device D/Time for Device B = 1/3