Based on the information, the point on the graph to show the estimated cost in dollars for a ticket in 2009 is (2009, 24).
The graph shows that the price of a ticket to the amusement park increased steadily from 1997 to 2009.
The estimated cost in 2009 is therefore likely to be higher than the cost in 2006, which was $22.50.
The point (2009, 24) is above the point (2006, 22.50), so it is a reasonable estimate for the cost of a ticket in 2009.
It is important to note that the graph is only showing the average price of a ticket.
The actual cost of a ticket may vary depending on factors such as the day of the week, the time of year, and the type of ticket purchased.