Unit 6, Lesson 7
Observing More Patterns in Scatter Plots
Grade 8
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
For the same data, two different models are graphed. Which model more closely matches the data? Explain your reasoning.
A scatterplot labeled A. Horizontal, from 37 point 5 to 112 point 5, by 12 point 5’s. Vertical, from 0 to 200, by 40’s. 19 data points above and below line, trend linearly upward and right, 6 points on line. The line begins at about 50 comma 70 and ends at about 100 comma 150.
A scatterplot labeled B. Horizontal, from 37 point 5 to 112 point 5, by 12 point 5’s. Vertical, from 0 to 200, by 40’s. 19 data points above and below line, trend linearly upward and right, 3 points on line. The line begins at about 50 comma 60 and ends at about 100 comma 140.
Problem 4
Here is a scatter plot of data for some of the tallest mountains on Earth.
The heights in meters and year of first recorded ascent is shown. Mount Everest is the tallest mountain in this set of data.
- Estimate the height of Mount Everest.
- Estimate the year of the first recorded ascent of Mount Everest.