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11/12 Scatterplots and Correlations
Presentation
•
Mathematics
•
8th - 9th Grade
•
Practice Problem
•
Medium
+2
Standards-aligned
Thomas G Rizo
Used 40+ times
FREE Resource
9 Slides • 18 Questions
1
We will take notes on this next week but feel free to write some examples in your journal.

2
A graph that shows the relationship of two data sets. (copy definition into your journal)
3
Copy these into your notes
4
Multiple Choice
What is a scatter plot?
A graph that shows the relationship of two data sets.
A graph drawn using rectangular bars to show how large each value is.
A graph that shows information that is connected in some way.
A graph that shows data changing over time.
5
Multiple Choice
What type of correlation does this scatterplot represent?
positive correlation
no correlation
negative correlation
6
Multiple Choice
What type of correlation does this scatterplot represent?
positive correlation
no correlation
negative correlation
7
Multiple Choice
What type of correlation does this scatterplot represent?
negative correlation
no correlation
positive correlation
8
Multiple Choice
What kind of correlation does this scatterplot show?
negative correlation
no correlation
positive correlation
9
Multiple Choice
Is this a positive, negative, or no relationship?
positive relationship
negative relationship
no relationship
10
Copy in your journal
11
Multiple Choice
Estimate the Correlation Coefficient.
r = 1
r = -0.5
r = -1
r = 0.5
12
Multiple Choice
Which of the following is the best approximation of the rvalue for the above graph?
–1.0
0.0
0.5
0.9
13
Multiple Choice
Estimate the correlation coefficient for this scatterplot.
A) r = -1
B) r = 1
C) r = 0.5
D) r = -0.5
14
Multiple Choice
Estimate the correlation coefficient for this scatterplot.
A) r = 0.5
B) r = 1
C)r = 0
D) r = -1
15
Multiple Choice
Approximate the correlation of the scatter plot.
r = 0
r = 0.5
r = -1
r = 1
16
Use the information from the graphs to answer quesitons.
17
18
19
20
21
Multiple Choice
y = 1/2x + 45
y = 2x + 9
y = -1/2x + 45
y = 45x + 2
22
Multiple Choice
The manager of a restaurant recorded how many people were in different groups of customers and how much those groups spent on food and beverages. The scatter plot shows the data she recorded.
Based on this scatter plot, about how much money would a group of 10 people be expected to spend on food and beverages at this restaurant?
$135
$115
$105
$150
23
Multiple Choice
Joe works at the ABC Company. The scatter plot shows the number of hours Joe worked and the amount he earned over a span of several pay periods.
Based on the graph, what is the best prediction of the amount Joe would earn if he works 55 hours?
$700
$900
$600
$800
24
Multiple Choice
25
Multiple Choice
If the carpenter worked for 6 days, what would be the best prediction of his earnings?
$1250
$1500
$1750
$2000
26
Multiple Choice
Which graph shows an accurate trend line for the scatter plot?
Graph A
Graph B
Graph C
Graph D
27
Multiple Choice
We will take notes on this next week but feel free to write some examples in your journal.

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