How do you figure out if doing more homework means getting a higher test

grade?Should I do my

homework?

In this lesson you will learn how to construct a scatter plot

by graphing data.

Let’s ReviewLet’s ReviewGraphing on a coordinate plane

(2,3)

(4,1)

(7,8)x-axis

y-ax

is

10987654321

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x y

x y

x y

Let’s ReviewA Common Mistake

Does it matter which data goes on each axis?

(3,4) is the same as (4,3)

Let’s ReviewCore Lesson

Name HW Done Test GradeJohn 5 70Jose 9 88

Justice 10 100

Let’s collect some BIVARIATE

data!Should I do my

homework?

Let’s ReviewCore LessonScatter plot: a graph of points on a

coordinate grid with each axis representing one of the two variables.

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Let’s ReviewCore LessonHW Done Test Grade

5 702 259 881 20

10 1002 459 1008 856 657 68

10 67Homework completed

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st sc

ore

Create a scatter plot using the data provided.

Let’s ReviewCore Lesson

Yes! Doing more homework means getting

a higher test grade!I will do my homework!

In this lesson you have learned how to construct a scatter plot

by graphing data.

Let’s ReviewGuided PracticeCreate a scatter plot to compare a person’s height to arm span.

Height (m) Arm Span (m)1.5 1.41.8 1.71.7 1.72.0 1.91.7 1.82.1 2.01.6 1.51.9 1.81.9 1.9

0.4 0.8 1.2 1.6 2.0

2.01.81.61.41.21.00.80.60.40.2

Height (m)Ar

m S

pan

(m)

Let’s ReviewExtension ActivitiesGiven the data tables below, determine the best scale for the x-axis and y-axis, then construct the scatter plots.Dollars Spent Gas Bought

(gallons)

10 3.34 1.8

15 4.77 2.3

12 3.8

Fat Grams Calories10 1851 701 459 1154 90

Let’s ReviewExtension Activities

Make a survey that collects two pieces of data. Ask 10 people and construct your own scatter plot with the results. Write a general statement about the relationship that the scatter plot shows.

Let’s ReviewExtension Activities

Find a data table in your local newspaper that compares two pieces of data. Construct a scatter plot using the data found. Write a general statement about the relationship that the scatter plot shows.

Let’s ReviewQuick Quiz

What does this point on the scatterplot represent?

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Let’s ReviewQuick QuizWhich scatterplot represents the data given?

Gas Bought(gallons)

Dollars Spent

4.6 $153.6 $123.1 $102.2 $71.5 $5

Let’s ReviewExtension Activities

CRCT vs. BenchmarkCreate a scatter plot from the data given. Decide if it has a positive, negative, or no correlation. What is the line of best fit?