Do Now

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Lets predict how many calories a sandwich would
have if it had 22 grams of fat.
Lets predict how many grams of fat a sandwich
with 650 calories would have.

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Is there a limit to how fast a man can run ?Take
a look at the world record times for the men's
100 m sprint from 1912 to 2002.
100 m Speed Demons   Date Time
Donald Lippincott USA 1912 10.6
Charles Paddock USA 1921 10.4
Percy Williams Can 1930 10.3
Jesse Owens USA 1936 10.2
Willie Williams USA 1956 10.1
Armin Hary Germ 1960 10.0
Jim Hines USA 1968 9.95
Calvin Smith USA 1983 9.93
Carl Lewis USA 1988 9.92
Leroy Burrell USA 1991 9.90
Carl Lewis USA 1991 9.86
Leroy Burrell USA 1994 9.85
Donovan Bailey Can 1996 9.84
Maurice Greene USA 1999 9.79
Tim Montgomery USA 2002 9.78
Use your calculator to write the equation of the
line Of best fit for this data. Round to the
nearest ten thousandth!!!
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1) Use your equation to predict the world
record time in the year 2020.
2) Use your equation to predict the year the
world record becomes 8.99 seconds.
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3) Use your equation to predict the world
record time in the year 3500.
Is this a reasonable answer? Why or why not?
Why do you think the answer worked out to be
unreasonable?
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• Use your calculator to write a linear regression
  equation for the set of data below.

Study Hours Regents Score
3 80
5 90
2 75
6 80
7 90
1 50
2 65
7 85
1 40
7 100
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1) Use your equation to predict Regents score
for someone who studies for 4½ hours.
2) Use your equation to predict how many hours a
person who scored a 6 studied for.