Line Graph

The graph shows the average price of petrol per litre, in the first nine months of a particular year.

1. State the month with the highest price of petrol.
2. Find the ratio of the price of petrol in the month of April to the month of September.
3. Express as a fraction of the first nine months, the number of months with petrol prices greater than \(\$1.50\) per litre.
   
4. Find the percentage increase in the price of petrol between January and September.
5. Steven needs to go to Town \(S\) in June which is \(264\) km away. Assuming his car is able to travel \(12\) km on a litre of petrol, calculate the amount he will spend on petrol for the trip.
6. On a certain month, Sebastian went to a petrol kiosk and paid \(\$50\) to fill his car with \(40\) litres of petrol. Find the month that Sebastian went to the petrol kiosk.