I drew the line like this.  Can you find two good points from this line? 
Click to see what I picked.

Using these two points what would the slope of the line be? 
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The slope of the line is -0.15.

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What is the meaning of this slope? 
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What would be the equation of this line? 
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Using this equation predict the winning time at the 2012 Olympics. 
Check your answer.

In the 2012 Olympics the winning time should be 9.66 seconds.

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Using the equation predict when the winning time will reach 9.3 seconds. 
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In 2036 the winning time should be 9.3 seconds.

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I hope you’re ready!  Time to take your assessment.

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