r/mam kindly solve the math's first question Make a Bar Graph  depicting how timings of 100 meters, 200 meters, and 400 meters races have changed over the span of last 5 olympic games,  Mam i am unable to solve it kindly give me some solution

Dear Student,
Here we are making the graph for 100 m race and we will be telling you the approach for the same.
First go through the Internet to get the records of say 100 m race and for years 1996, 2000, 2004, 2008, 2012 Olympic games.
Now in 1996 the fastest record was 9.84 second by Donovan Bailey. 
In 2000 the fastest record was 9.87 second by Maurice Greene. 
In 2004 the fastest record was 9.85 second by Justin Gatlin. 
In 2008 the fastest record was 9.69 second by Usain Bolt 
In 2012 the fastest record was 9.63 second by Usain Bolt.

So we can see that there is sufficient decrease in the time take,
Here is the bar graph between years and time taken.


Similarly prepared for other races.
Regards

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