macroeconomic question 8 module 6

Gapminder is a free online tool founded by medical doctor Hans Rosling that allows people to visually explore datasets over time.  In one video, Rosling shows how the world has changed over the past 200 years by examining life expectancy and income per person: 

http://www.youtube.com/watch?v=BPt8ElTQMIg

Use Rosling’s video to compare the world 200 years ago to present by answering the following questions.

a)       a) What patterns in the data existed initially (around 1809)?

b)       b)  What patterns in the data do we have today (around 2007)?

c)        c)How has the range (the highest value minus the lowest value) of life expectancy and income per person changed over     the past 200 years? 

d)      d)  In which ways can one say the world is definitely better off now versus 200 years ago?