The official 2008 FRQs and Scoring Guidelines (rubric):  

https://secure-media.collegeboard.org/apc/ap08_macro_econ_frq.pdf
https://secure-media.collegeboard.org/apc/ap08_macroecon_sgs.pdf
Scoring Rubrics for 2008 FRQ for Macro 3
2008 FRQ Macro #3
Minimize Screen to 90% or 80%.
DIRECTIONS:

On the graph to the left, scroll down to #3.  To enlarge the question, press the +
button located above the Rayland/Artland PPC graph or open the
question link below.

Scroll down to see the scoring guideline or click on link below.