Question

We whose Names are under-written, do assure the World, that the POEMS specified in the following Page, were (as we verily believe) written by PHILLIS, a young Negro Girl, who was but a few Years since, brought an uncultivated [meaning not educated] Barbarian from Africa, and has ever since been, and now is, under the Disadvantage of serving as a Slave in a Family in this Town. She has been examined by some of the best Judges, and is thought qualified to write them." (John Wheatley, To the Publick)
The tone of the preceding passage can best be described as:

informal

angry

hopeful

official

Answer 1

Informal

Hope it helped

Answer 2

Informal because look at all the information it is giving you !