Sports became popular in the late 1800s because

of lighting technology, developing labor, and education laws.

[Also, games like early verisons of baseball were played casually]

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

1) the degree of the function is odd, so the ends of the graph continue in opposite directions. because the leading coefficient is positive, the left side of the graph continues down the coordinate plane and the right side continues upward.