BCE Jones Scatter Plots

A scatter plot is a graph that is used to show data between two variables.

• ​For ex: height and weight.​

​c

A scatterplot consists of an X axis(the horizontal axis), a Y axis (the vertical axis), and a series of dots. Each dot on the scatterplot represents one observation from a data set. The position of the dot on the scatterplot represents its X and Y values.

Scatter plots show patterns, trends, and correlations between variables that could impact each other.​

Scatter Plots

​Positive Association	​Negative Association	​No Correlation
​Both variables are increasing.	One variable is increasing, the other is decreasing.​	There is no relationship between the variables.​

​Types of Correlation

Multiple Choice

What type of correlation does this graph have?

• positive 

• negative

• none

• all of the above

Multiple Choice

What is the correlation?

• Negative correlation

• No correlation

• Positive correlation

Match

Match the following

No Correlation

Positive, Linear Correlation

Negative, Linear Correlation

• No Correlation

• Positive, Linear Correlation

• Negative, Linear Correlation

Multiple Choice

Which scatter plot shows a linear relationship between x and y?

• Graph A

• Graph B

• Graph C

• Graph D

Correlation tests for a relationship between two variables. However, seeing two variables moving together does not necessarily mean we know whether one variable causes the other to occur. This is why we commonly say “correlation does not imply causation.”

Study Time and Grades

As study hours increase, grades increase. There is a positive correlation between hours and grades.

So....Do hours spent studying cause higher grades?

5.9C Teacher Table

A swimming pool is being filled

with water. The scatterplot

shows the number of gallons in
the pool for different numbers of

minutes.

How many gallons of water will
be in the pool after 15 minutes?

A.

150 gallons

B.

165 gallons

C.

225 gallons

D.

250 gallons

Day Two: Mini-Lesson – Introduce representing data in a scatterplot