Step-by-step explanation:
14 gallons bought for $34.72
1 gallon bought for

=$2.48
The only point in the solution space is that of selection ...
C (1, 3)
This has a slope of 3, you can plot it on a graph and count rise over run.
Answer:
(3,2)
Step-by-step explanation:
If you have any questions about the way I solved it, don't hesitate to ask me in the comments below =)