In a study of towns, there was a positive correlation between the number of mail boxes and the number of traffic lights in a tow
n. Which variable is most likely the lurking variable that explains the correlation?
A . Population
B. Commute times
C. Ages of residents
D. Highest temperatures
2 answers:
1. 25 + 3u = 2u
-3u = -3u
25 = -u
-25=u
2. 14x - 8 = 6x
8x - 8 = 0
8x = 8
x=1
3. 8.5 - 3z = -8z
8.5 = -5z
-1.7 = z
4. 9m + 14 = 2m
7m + 14 = 0
7m = -14
m = -2
The answer is A, population. If there are more people, it means there will be more mail boxes and a higher need for traffic lights.
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