We are given the slope is $200 where the number of clubs is the x-value where they say "per club" and $800 is the deposit. Therefore the equation will be:
y = 200x + 800
This will find the amount of money that the trip will cost and it is adding 800 because y is counting the cost of how much they will pay. Now when x = 0 on the graph, plot a point where y = 800, and make it increase by 200 each time x increases by 1. This will be your graph.