document.write( "Question 1156488: The table below shows the world record in the men’s 100-meter dash from 1912 to 2009. Use this to answer Questions 5 - 8. (Note: A change to electronic timing in the 1970s might explain the 30-year gap in records from 1968 to 1999.)\r
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document.write( "Men's 100=meter dash2
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document.write( "Year World Record Time
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document.write( "(nearest tenth)
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document.write( "1912 10.6
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document.write( "1921 10.4
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document.write( "1930 10.3
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document.write( "1936 10.2
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document.write( "1956 10.1
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document.write( "1960 10
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document.write( "1968 9.9
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document.write( "1999 9.8
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document.write( "2008 9.7
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document.write( "2009 9.6
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document.write( "Start of Questions
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document.write( "Create a scatter plot on paper - it's best to do this on graph paper - using the data relating year and world record time on the 100 meter dash. Let the horizontal axis represent years, t, where t is the number of years after 1900. The vertical axis represents R, the time in seconds of the record 100 meter dash. Use a straight edge to draw the line you think is the best linear model for this data. Write the equation of that line here.\r
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document.write( "R = =-0.028t+20.8=18 \n" );
document.write( "
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