Hey there!
Basically it wants you to add 3 and 8 from each other, what ever the answer to that part, you multiply the result by 9
Here this is what i meant

Or you could do this method too!

They both give you the result of 
So, I am assuming your expression would look like this: 
Good luck on your assignment and enjoy your day!
~
We are finding slope:
change in y / change in x
277 - 205 / 2007 - 1997
72 / 10
7.2
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Where is the graph? Because it would be a lot easier to answer this if you could show a picture of the graph
$.58 ; 3.24-.29is 2.95 and 2.95 divided by 5 is .58