Question 934822
If 


x = # of hours person is awake
y = # of hours person is asleep


then we know that x+y = 24 which turns into y = -x + 24. 
We have a perfect linear correlation going on here which means <font size=5 color="red">r = -1.0</font>. 
The value of r is negative to reflect the fact we have a negative slope.


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