A) You need to answer both parts. Yes, Elliot's fee increases by $60 per year. The initial value of Elliot's fee is $750.
B) The answers to part A give you all the information you need to write a suitable equation in slope-intercept form. The slope is the rate of change per year (60), and the intercept is the initial value (750).
.. fee = 60*(years since 2000) +750 . . . . . fee is in dollars
If you like, you can define and use single-letter variables for "fee" and "years since 2000".
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Be careful with hyphens and minus signs around numbers. The way you have written your answer makes it look like the rate of change is -60. Oops.