Answer:
y = 0.02x
$0.14
Step-by-step explanation:
Let
x = number of days the station was lowering the price of the gas
y = total change in gas price (after x days)
Each day the station lowered the price by $0.02, then after x days the price was lowered by $0.02x. Thus,
y = 0.02x
After 7 days the total change in gas price is
For this case we must find the unit cost (dollars per pound) of each site and then compare.
We take into account that:
1kg equals 2.205 pounds
So, we have:
Site 1:
Site 2:
So, the unit cost is:
Thus, the best deal is on site 2.
ANswer:
The best deal is on site 2.