Lesson 1-7 Pages 40-44 Scatter Plots. What you will learn! 1. How to construct scatter plots. 2. How...
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Lesson 1-7 Pages 40-44 Scatter Plots
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Transcript of Lesson 1-7 Pages 40-44 Scatter Plots. What you will learn! 1. How to construct scatter plots. 2. How...
Lesson 1-7 Pages 40-44
Scatter Plots
What you will learn!1. How to construct scatter plots.
2. How to interpret scatter plots.
Scatter plotScatter plot
What you really need to know!
A scatter plot is a graph that shows the relationship between two sets of data. In a scatter plot two sets of data are graphed as ordered pairs on a coordinate system. A scatter plot may show a pattern or relationship of the data. The relation may be positive or negative, or there may be no relationship.
Example 1:
The table shows the average cost of a loaf of bread from 1920 – 2000. Make a scatter plot of the data.
YearYear 19201920 19301930 19401940 19501950 19601960
CentsCents 1212 99 88 1414 2020
YearYear 19701970 19801980 19901990 20002000
CentsCents 2424 5252 7272 9999
0
10
20
30
40
60
50
70
80
90
01920
1930
1940
1950
1960
1970
1980
1990
2000 Y
ear
Cen
ts
YearYear 19201920 19301930 19401940 19501950 19601960
CentsCents 1212 99 88 1414 2020
YearYear 19701970 19801980 19901990 20002000
CentsCents 2424 5252 7272 9999
Example 2:
Determine whether a scatter plot of the data for the following might show a positive, negative, or no relationship.
Explain you answer.
Height of basketball player and number of rebounds.
2
4
6
8
10
66 68 70 72 74
Reb
ound
s
Height (in)
As the height increases, the rebounds increase. Positive relationship.
Shoe size and math test scores.
60
70
80
90
100
4 6 8 10 12
Tes
t Sco
res
Shoe Size
No Relationship!
Example 3:
The table shows temperatures in degrees Celsius and the corresponding temperatures in Fahrenheit.
Make a scatter plot of the data.
°F°F 3232 4141 5050 5959 6868 7777 8686°C°C 00 55 1010 1515 2020 2525 3030
0
30
40
50
60
7080
90
5 10 15 20 25 30 35 40
Fah
renh
eit
Celsius°F°F 3232 4141 5050 5959 6868 7777 8686
°C°C 00 55 1010 1515 2020 2525 3030
Does the scatter plot show a relationship between °C and °F?
Yes. A positive relationship.
Predict the Fahrenheit temperature for 35°C.
0
30
40
50
60
7080
90
5 10 15 20 25 30 35 40
Fah
renh
eit
Celsius°F°F 3232 4141 5050 5959 6868 7777 8686
°C°C 00 55 1010 1515 2020 2525 3030
95°F
Page 42
Guided Practice
#’s 3-7Link to Pre-Made Lesson
Pages 40-42 with someone at home
and study examples!
Read:
Homework: Pages 42-44
#’s 8-19 all
#’s 23-37
Lesson Check 1-CH1
Page
726
Lesson 1-7
Lesson Check 1-CH1
Study Guide and Review
Pages
47-50
#’s 1-36(Odd answers in back of book)
Prepare for Test!
Page
51
#’s 1-25 Lesson Check1-CH1
Prepare for Test!
Pages
52-53
#’s 1-16
