Unit 5, Lesson 23
Observing More Patterns in Scatter Plots
Accelerated 7
Practice
Problem 1
Literacy rate and population for the 12 countries with more than 100 million people are shown in the scatter plot.
Circle any clusters in the data.
A scatterplot. Horizontal, from 0 to 1600000000, by 400000000’s, labeled populations. Vertical, from 50 to 100, by 12.5’s, labeled literacy rate. 7 data points grouped in upper left corner. 1 data point in upper right corner. 3 data points in lower left corner. 1 data point above lower right corner.
Problem 2
Here is a scatter plot:
Select all the following that describe the association in the scatter plot:
Linear association
Non-linear association
Positive association
Negative association
No association
Problem 3
Different stores across the country sell a book for different prices. The table shows the price of the book in dollars and the number of books sold at that price.
| price in dollars | number sold |
|---|---|
| 11.25 | 53 |
| 10.50 | 60 |
| 12.10 | 30 |
| 8.45 | 81 |
| 9.25 | 70 |
| 9.75 | 80 |
| 7.25 | 120 |
| 12 | 37 |
| 9.99 | 130 |
| 7.99 | 100 |
| 8.75 | 90 |
-
Draw a scatter plot of this data. Label the axes.
- Are there any outliers? Explain your reasoning.
- If there is a relationship between the variables, explain what it is.
- Remove any outliers, and draw a line that you think is a good fit for the data.
Problem 4
Using the data in the scatter plot, what can you tell about the slope of a good model for this data?
The slope is positive.
The slope is zero.
The slope is negative.
There is no association.
Problem 5
Here is an unbalanced hanger diagram.
- If you know each circle weighs 6 grams, what do you know about the weight of each triangle? Explain your reasoning.
- If you know each triangle weighs 3 grams, what do you know about the weight of each circle? Explain your reasoning.