Answer:
x=7
y= 18
Step-by-step explanation:
15.5% is the same as 15.5/100 or 155/1000, which you can take a 5 out of.
After that, you will get 31/200
The scale factor is 5. 2 corresponds to 10 and 3 corresponds to 15. 1 must correspond to x, which is 5 times 1. The answer is x = 5.
The answer is $2.7 per gallon