Enjoy any 5 free lessons!
You can pick. No account needed.
Watch VideoYou have remaining on your free trial.
4 Free Lessons Left
Get unlimited access to all videos and lesson plans with a membership.
So you can keep watching more great videos in class, ask your teacher or principal to get a School plan membership.
Become a member to get full access to our entire library of learning videos, reading material, quiz games, simple DIY activities & more.
Become a member to get full access to our entire library of learning videos, quiz games, & more.
Plans & Pricingto watch this full video.
Access All Videos
and Lessons, No Limits.
Access All Videos
No credit card required,
takes 7 sec to signup.
No card required
Readytogo lessons
that save you time.
Readytogo lessons
If you are on a school computer or network, ask your tech person to whitelist these URLs:
*.wistia.com, fast.wistia.com, fast.wistia.net, embedwistiaa.akamaihd.net
Sometimes a simple refresh solves this issue. If you need further help, contact us.
Create a free account to unlock all content!
Get Full AccessScatter Plots (Displaying Bivariate Data)
 Show lesson plan & teacher guide
 Show answers to discussion questions
 Show video only
 Allow visiting of other pages
 Hide assessments
What you will learn from this videoWhat you will learn
 We'll learn how to display data using a scatter plot.
 We’ll also learn that a scatter plot can show the relationship between two variables.
 And we'll discover how this knowledge can help us sell ice cream, climb mountains, and even take care of a dog.

Discussion Questions
Before Video
What is data? What are some examples of data you could collect?ANSWERData is information that is collected. Answers will vary.
I make a number line that shows the range of the data in my data set. Then I put a point above a number on the number line for each time that number appears in my data set.
Sarrie could plot either the distances OR the times on a line plot. She couldn't plot both on the same line plot.
No, all of the data displays I know only show one variable.
They may want to figure out if the data have a relationship, like if being further from school means they take longer to get to school.
After Video
What are some examples of bivariate data you could collect?ANSWERIt should be data where the information collected has two numeric values, such as height versus weight.
Pick one variable to be on the xaxis. The other variable goes on the yaxis. Write a coordinate pair for each piece of data. Then plot each data point.
In general, as the xvalue increases, the yvalue also increases.
In general, as the xvalue increases, the yvalue decreases.
I can draw a line that goes approximately through the middle of the data. To find the equation, I can use two points on the line to calculate the slope. I can also use a point and the slope, or look at the graph, to find the yintercept. The equation is in the form y = mx + b.

Vocabulary
 Line plot DEFINE
A data display that shows singlevariable data as points along a number line.
 Data DEFINE
Information gathered.
 Bivariate data DEFINE
Data that has two variables.
 Coordinate plane DEFINE
A twodimensional plane made up of two number lines that intersect at 0.
 Coordinate pair DEFINE
When you plot a point on a coordinate plane, you identify the location of the point on the xaxis (horizontal) and yaxis (vertical). A coordinate pair shows the location in the form (xcoordinate, ycoordinate).
 Scatter plot DEFINE
A data display that shows bivariate data on a coordinate plane.
 Positive association DEFINE
A trend in bivariate data where when the value of the xcoordinate increases, the value of the ycoordinate also increases.
 Negative association DEFINE
A trend in bivariate data where when the value of the xcoordinate increases, the value of the ycoordinate decreases.
 Outlier DEFINE
A value that does not follow the general trend of a set of data.
 Cluster DEFINE
Bivariate data is clustered if the data are very close together when plotted.
 Line plot DEFINE

Reading Material

Practice Word Problems

Practice Number Problems

Lesson Plan

Teacher Guide