Lesson 7: Practice Problems

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 scatter plot of population vs literacy rate with data in different clusters.

Problem 2

Here is a scatter plot.

Select all the following that describe the association in the scatter plot:

A scatter plot of age (weeks) vs weight (pounds) with data in a positive correlation.

  1. Linear association

  2. Non-linear association

  3. Positive association

  4. Negative association

  5. No association

Problem 3 From Unit 6 Lesson 5

For the same data, two different models are graphed. Which model more closely matches the data? Explain your reasoning.

A scatter plot of data with a line of best fit going through the middle of the data.
A scatter plot of data with a line of best fit going below most of the data.

Problem 4 From Unit 6 Lesson 3

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.

A scatter plot of first ascent vs height in meters. Data is scattered.

  1. Estimate the height of Mount Everest.

  2. Estimate the year of the first recorded ascent of Mount Everest.

Problem 5 From Unit 5 Lesson 18

A cone has a volume , radius , and a height of 12 cm.

  1. A cone has the same height and of the radius of the original cone. Write an expression for its volume.

  2. A cone has the same height and 3 times the radius of the original cone. Write an expression for its volume.