The answer is a=0. I hope I helped
We are given equation g = 748u, where g is the total number of gallons of water used and u is the number of units.
We can see that the number of units of water being used by customers.
The number of units of water doesn't depend on the total number of gallons of water used.
Therefore, the number of units u is an independent variable.
The value of the total number of gallons is totally depends on the number of units used.
Therefore, the total number of gallons of water used g is a dependent variable.
So, we can conclude following statements:
1) g is the dependent variable.
2) u is the independent variable.
6+1
8-1
10-3
14-7
Theses are also equal to ur answer
15 miles/2.5 mph=15/2.5=6 hours left
so 6 hours, 15 miles which is option D
