(B)
Explanation:
4 quarts are in a gallon so one gallon equals 4(1). The one represents the amount of gallons so if there are x gallons it would become 4(x)
Answer:
1/2
8
Step-by-step explanation:
When its talking about the result or output, look at the range, and then follow the line(s) back to the number(s) in the domain. Do the opposite when it's talking about the function of a certain number, e.g. f(4).
Notice the table of values, thus let's pick two points from it, to check what the slope may be,

First you subtract the 30 from 300 and than 270/45 and your answer will be A. 6
Day Sis you
1 -30 20
2 0 40
3 30 60
4 60 80
5 90 100
6 120 120
So day 6.