Scatter Plots

Scatter Plots and Correlation

Definition

A scatter plot is a graph with points plotted to show a potential relationship between two sets of data.

Correlation is a fancy way to describe the relationship between two variables.

Fill in the Blank

We are trying to find if the X and Y have a ____________ with each other.

Multiple Choice

Can you guess the correlation?

• positive

• negative

• none

Multiple Choice

Can you guess the correlation?

• positive

• negative

• none

Multiple Choice

Can you guess the correlation?

• positive

• negative

• none

​Outliers	​Clusters
​An outlier is a data point in a scatter plot that does not follow the trend of the data.	A group of data points that are closely grouped together.​

​outlier

cluster

Multiple Choice

What is the correlation between length of running start and distance of jump?

• positive: the further you run the further you jump

• negative: the less you run the less distance of your jump

• positive: the further your running start the less your distance

Multiple Choice

What type of association does this scatter plot show?

• positive linear association

• negative linear association

• no association

• nonlinear association

Multiple Choice

If a scatterplot has no association then...

• ...it has no ordered pairs

• ...it has ordered pairs that have a negative pattern

• ...its ordered pairs have no predictable pattern

• ...if it makes a lion on a graph (roar!)

Multiple Choice

As the age of the car increases, its value decreases. Which scatterplot represents this relationship?

• A
• B
• C
• D

Multiple Choice

What is the correlation?

• Negative correlation
• No correlation
• Positive correlation
• All of the above

Multiple Choice

In a Positive Correlation both the X any Y values are

• Increasing

• Decreasing

Multiple Choice

In a Negative Correlation the X values are ______ and the Y values are ___.

• Decreasing : Increasing

• Increasing : Decreasing

Multiple Choice

When there is No Correlation the X values and the Y values...

• Have no relationship

• Are related

Multiple Choice

Determine the correlation.

• positive

• negative

• no correlation

Multiple Choice

• positive

• negative

• no correlation

Multiple Choice

Determine the correlation.

• positive

• negative

• no correlation

Multiple Choice

What type of relationship does this scatter plot show?

• Negative linear relationship

• Positive linear relationship

• No relationship

• Nonlinear relationship

Multiple Choice

In a scatterplot, an outlier...

• ...is something we didn't learn 8th grade
• ...is a puppet with a long nose named Pinocchio
• ...is a point that is far outside the main cluster of points/ordered pairs
• ...is a really naughty point who doesn't tell the truth when outside

Multiple Choice

As x increases, y increases

• correlation coefficient

• causation

• positive correlation

• negative correlation

Multiple Choice

What type of association does this graph have?

• positive 

• negative

• none

• all of the above

Multiple Choice

You are analyzing a scatter plot that has a negative correlation. What is true of the of the x and y values?

• As x increases, y decreases

• As x increases, y increases

• As x decreases, y decreases

Multiple Choice

What represents the x axis?

• ABC Company

• Hours Worked

• Amount Earned in Dollars

• Hours in Car

Multiple Choice

What represents the y axis?

• ABC Company

• Hours Worked

• Amount Earned in Dollars

• Hours in Car

Multiple Choice

What represents the X axis?

• Weight gained

• Calories Consumed

• Positive

• Line of Best Fit

Multiple Choice

What represents the Y axis?

• Weight gained

• Calories Consumed

• Positive

• Line of Best Fit

Multiple Choice

What represents the X axis?

• Orange

• Purple

• Temperature

• Sales

Multiple Choice

What represents the Y axis?

• Orange

• Purple

• Temperature

• Sales

Line of best fit

You are learning on your own, pay attention to each question as it will help build your understanding.

Multiple Choice

Which of the following lines represents the line of best fit for the scatter plot?

• There is no line of best fit for this graph.

• B

• C

• D

Multiple Choice

Which of the following lines represents the line of best fit for the scatter plot?

• A

• B

• C

• D

Multiple Choice

Which of the following lines represents the line of best fit for the scatter plot?

• A

• B

• C

• D

Multiple Choice

Which of the following lines represents the line of best fit for the scatter plot?

• A

• B

• C

• D