Answer:
Answer = 
Step-by-step explanation:
Step 1:-
simplifying 

base are equal powers are added
on simplification 
Closest together means that the difference between the high and the low is the smallest.
Atlanta:
106 - -12 = 118
Boston:
103 - -19 = 122
Chicago:
100 - -32 = 132
Dallas:
111 - -8 = 119
The city that has the record high and low closest together is A) Atlanta.
Hope this helps!! :)
I think it is a direct variation because if you divide 9/3, 27/3, 39/13, and 60/20 it will all give you the same number which is 3.
I hope this helps.
1 oz = 0.0625 lbs or 1/16 lbs
1 lb = 16 oz
Hope I helped!