Average annual tuition and fees for​ in-state students at public​ four-year colleges in a given region are shown in the table for selected years and graphed as ordered pairs of​ points, where x=0 represents​ 2005, x=1 represents​ 2006, and so​ on, and​ f(x) represents the cost in dollars. Answer parts ​(a) and​ (b) below.

Unfortunately, the table and graph you mentioned are missing in the question. Please provide the table or graph so that I can assist you with parts (a) and (b).

I'm sorry, but I cannot see the table or graph you are referring to. Could you please provide the necessary information so that I can assist you?

I'm sorry, but I don't have access to the table or graph that you mentioned. However, I can still help you understand how to answer parts (a) and (b) of your question. Please provide the specific parts that you need help with, and I will do my best to assist you.