Line WV is perpendicular to both line RS and line TU. On a coordinate plane, 3 lines are shown. Line V W goes through (negative 1, 5) and (1, 5). Line R S goes through (negative 5, 3) and (5, 1). Line T U goes through (negative 1, negative 2) and (4, negative 3).

Which statement must be true about line TU?

the correct answer is:   the domino theory states that if one country in a region came under the influence of communism, then the surrounding countries would follow in a domino effect.

the border between arizona and new mexico is a thin, black line; this indicates a state boundary.

its correct: it's a thin line, and it's a state boundary, correct

but equal

explanation:

plessy v. ferguson (1896) is an important us supreme court decision that kept racial segregation based on "separate but equal". however, these racially segregated trains and places were not actually equal. plessy v. ferguson (1896) was finally overturned by brown v. board of education in 1954.

it attempted to use force to bring democracy to certain countries.