Question 1147528
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.
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OK.
Now what?