

Lesson 4.5 Scatter plots
Presentation
•
Mathematics
•
8th Grade
•
Medium
+2
Standards-aligned
Ashley Harshbarger
Used 442+ times
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10 Slides • 7 Questions
1
Lesson 4.5 Scatter plots

2
Learning Goals:
I can create and interpret scatter plots.
I can use trend lines to make predictions.
3
Vocab
Scatter plot: a graph with points plotted to show a relationship between 2 sets of data
4
Example 1
The table shows the number of species added to the list of endangered and threatened species in the United States during the given years. Graph a scatter plot using the given data.
5
Vocab
Correlations: describes relationships between 2 sets of data
Positive Correlation: both data sets increase
Negative Correlation: one set increases while the other decreases
No Correlation: No relationship
6
Example 2
Describe the correlation illustrated by the scatter plot.
7
Example 3
Identify the correlation you would expect to see between each pair of data sets. Explain.
A. The number of empty seats in a classroom and the number of students seated in the class
B. The number of pets a person owns and the number of books that person read last year.
C. The monthly rainfall and the depth of water in a reservoir
8
Multiple Choice
Which scatter plot show a positive relationship?
Graph A
Graph B
Graph C
Graph D
9
Multiple Choice
What type of correlation does this scatter plot show?
positive
negative
no correlation
nonlinear association
10
Multiple Choice
What type of correlation does this graph have?
Negative
no association
positive
11
Example 4
Choose the scatter plot that best represents the relationship between the number of days since a sunflower seed was planted and the height of the plant. Explain.
12
Multiple Choice
Which sentence describes the relationship shown on this scatter plot?
As the temperature decreases, the visitors increase.
As the temperature increases, the number of visitors increases.
As the visitors increase, the temperature decreases.
No correlation
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Vocab
Trend Line (Line of best fit): Shows correlation between the data sets
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Example 5
The scatter plot shows a relationship between the total amount of money collected and the total number of rolls of wrapping paper sold as a school fundraiser. Based on this relationship, predict how much money will be collected when 175 rolls have been sold.
15
Multiple Choice
Mrs. Collins made a scatterplot to show the relationship between the number of absences and a student’s final exam score. Based on this scatterplot, a student with 12 absences should get approximately what score on the final exam?
60
92
70
76
16
Multiple Choice
17
Multiple Choice
What type of correlation does this graph have?
positive
negative
none
all of the above
Lesson 4.5 Scatter plots

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