Explain what the xyz affair was and how did President Adams use it to help unify the country

Ymultiplies by 7 for everytime x increases by 1

The  pan-african movement  was an "emotional, cultural, psychological and ideological  movement  that began among the  african  dispora in the western hemisphere, for a closer  purpose, so that  african  people could feel secure, attain political, economic as well as psychological power visa vis other races or world regions" .