The diagram shows a party-filled petrol tank. A quarter of the tank is filled with petrol.

1 cubic metre is equivalent to 1000 litres.
Work out how many more litres of petrol are needed to fill the tank .

Ineed big ! the cost of a school banquet is $25 plus $15 for each person attending. create a table, sketch the graph, and write an equation in slope-intercept and point-slope form that gives total cost as a function of the number of people attending. what is the cost for 77 people?