Answer:
X and Y is the times recorded and represented by Aubrey and Fatima
Step-by-step explanation:
Given from the question we say,
Let x= be the time recorded by Audrey
Let y= be time recorded by Fatima
The distance that Aubrey and Fatima run is remains the same as the constant 150 meters and also same for the end markers.
Therefore the difference will be the times that markers which is considered as a (variables) that each take to move the same distance will be recorded,
therefore y and x shows the times recorded by Fatima and Aubrey
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