Lesson 3

What a Point in a Scatter Plot Means

Let’s investigate points in scatter plots.

Problem 1

Here is a table and a scatter plot that compares points per game to free throw attempts for a basketball team during a tournament.


free throw

player A 5.5 28.3
player B 2.1 18.6
player C 4.1 13.7
player D 1.6 10.6
player E 3.1 10.4
player F 1 5
player G 1.2 5
player H 0.7 4.7
player I 1.5 3.7
player J 1.5 3.5
player K 1.2 3.1
player L 0 1
player M 0 0.8
player N 0 0.6
Scatterplot, free throw attempts per game, 0 to 6 by 1, points per game, 0 to 30 by 5. Points given by accompanying table.

  1. Circle the point that represents the data for Player E.
  2. What does the point \((2.1,18.6)\) represent?
  3. In that same tournament, Player O on another team scored 14.3 points per game with 4.8 free throw attempts per game. Plot a point on the graph that shows this information.

Problem 2

Select all the representations that are appropriate for comparing exam score to number of hours of sleep the night before the exam.




Scatter plot


Dot plot




Box plot

(From Unit 6, Lesson 2.)

Problem 3

A cylinder has a volume of \(36\pi\) cm3 and height \(h\). Complete this table for the volume of other cylinders with the same radius but different heights.

height (cm) volume (cm3)
\(h\) \(36\pi\)
\(\frac h2\)
\(\frac h5\)
(From Unit 5, Lesson 17.)