11/22/2010

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Guessing AgesTeacher Notes

• Have fun today!• Slide 13 asks you to give students your age.

Purpose• Recall how to graph a scatter plot• Identify independent and dependent variables of a data

set.• Learn how to identify, understand, and apply an

understanding the correlation in a scatter plot: positive vs. negative and strong vs. weak.

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LaunchLaunchLaunchLaunchYou are going to guess ages of famous people.

How could you determine who at your table is the best guesser?

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Linear Models Target 2a I can describe the correlation of data in

scatter plots in terms of strong or weak, and positive or negative.

Write one math word you already know. Write one math word you expect to learn in this lesson.

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Guessing AgesGuessing Ages

• Hillary Clinton• Rob Pattinson• Alana Thompson• Nicki Minaj• LaMarcus Aldrige

How old is … ?

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Guessing AgesGuessing Ages

• Teacher’s Choice• Samuel L Jackson• Jennifer Lawrence • Channing Tatum• Hugh Jackman

How old is … ?

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Guessing AgesGuessing Ages

The Actual Ages

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Hillary Clinton

• 65

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Rob Pattinson

• 26

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Alana Thompson

• 8

Honey Boo Boo

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Nicki Minaj

• 30

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LaMarcus Aldridge

• 27

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Teacher’s Choice

• __

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Samuel L Jackson

• 63

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Jennifer Lawrence

• 22

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Channing Tatum

• 32

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Hugh Jackman

• 44

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Make a prediction• Based on the information in your table,

who in your group is the best guesser?

Guessing AgesGuessing Ages

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Make a scatter plot• Which variable should go on the x-axis? Why? This is the independent variable.

• Which variable should go on the y-axis? Why? This is the dependent variable.

• What does a scatter plot need?

Guessing AgesGuessing Ages

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• What do you think the word correlation means?

• If you’re not sure, what do you think this word means? Look for a part of the word you recognize.

• Does it look like any words you know?

Describing CorrelationDescribing Correlation

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Describ

ing

C

orre

latio

nD

escrib

ing

C

orre

latio

n

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Describing CorrelationDescribing Correlation

Let’s share.• Who has a graph with a

strong correlation?• Who has a graph with a

weak correlation?• Who has a graph with

no correlation?

Now, look at your Guessing Ages Scatter Plot

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DebriefDebrief

What do you think a perfect guesser’s scatter plot would look like?

Best Guesser

How can you determine who is the better guesser using the:

• table?• scatter plot?

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5

3

12

4

Did you hit the target? I can describe the

correlation of data in scatter plots in terms of strong or weak, and positive or negative.

Rate your understanding of the target from 1 to 5.

5 is a bullseye!

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Ticket Out

What would it mean about the guesser, if their scatter plot had a Strong Negative correlation?