What is the purpose of the 3/5 compromise? to whom is the compromise benefiting the most?

Ireally need on this homework! if you get it right so much if not its fine < 3 ! (i have no points so sorry its only 10)i didnt mean to put it on social studies sorry!

What are the three criteria necessary to qualify for special education services under the individuals with disabilities education act category of intellectual disabilities? an intellectual functioning of 70 or more on a standardized iq test significant difficulty with tasks of everyday living (adaptive behavior) subaverage intellectual function (2 or more sd below the mean on a standardized iq test) impaired intellectual performance due to a traumatic brain injury deficits in intellectual functioning occur during the developmental period to distinguish id from other disabilities

Which choice best describes the general trend for the countries shown, for the period 2008 - 2010?