Please help with question 3 and 4 PLEASE

When developing a written argument, what best explains why an author would use a graph as a source? a graph gives numeric evidence visually. a graph is easy to read and understand. a graph is colorful and will engage the reader. a graph can be used to refute an argument.

2. page 1: schlosser describes "just another gorgeous rocky mountain vista. and yet cheyenne mountain is hardly pristine." why do you think schlosser describes the beautiful cheyenne mountain scene in detail before describing the military installation that lies inside?

Why did the author include the fact that 40,000 african americans participated in the bus boycott