What are different levels of constituencies, measured by closeness to representatives?

Hurry ! between 1900 and 2010, how did the world’s population change? a. it increased from about 1.5 billion to almost 7 billion. b. it decreased from about 7 billion to about 1 billion. c. it increased from about 5 billion to about 7 billion. d. it decreased from about 7 billion to about 1.5 billion.

8y=-6x+24 whats the slope and y-intercept

Which factor contributed to the rise of african empires such as ghana and mali?