How does this passage characterize the relationship between whites and African Americans?

What tactic did palestinians use against israel in 1987

Ascientist performs an experiment where she measures the mass of a piece of metal, pours acid onto the metal, washes the metal, and then re-measures the mass of the metal. the scientist repeats the experiment several times, each time increasing the amount of acid used. the dependent variable in the experiment is the: initial mass of the metal final mass of the metal amount of acid used washing the metal

How did the supreme court decision in the slaughterhouse cause have an affect american business