To determine the price of gas at the gas station , you find the slope in the graph.
In the first graph , take point {3,3} and point {6,9} which are on the line
To find the slope, m, which is the constant rate / price of gas at the gas station apply the formula:
m= change in y-coordinate values/change in x-coordinate values
m= 9-3 /6-3
m= 6/3
m= 2
The price of gas at this station is $2 per liter
Answer: $2 per liter
