Answer: 
Step-by-step explanation:
Given
The total length of the trip is 
Car average is 28 miles per gallon
So, car requires

Price of gas is $2.95 per gallons

So, the cost of the trip is 
J) -1
-1+-1+-1+-1+-1+1+1+1+1+1+1=-1
From 40 to 32, is just 8 bucks, so the jacket went from 40 to 8, so is discounted by 8 bucks.
now, if we take 40 to be the 100%, how much is 8 off of it in percentage?

solve for "x".
Linear. It is an additional constant charge per mile.