Scatter Plots and Line of Fit

In a scatterplot, a cluster...

• ...is something we didn't learn in 8th grade
• ...is a point on the origin
• ...is a point that is far outside the main cluster of points/ordered pairs
• ...is a group of points that are close together

In a scatterplot, an outlier...

• ...is something we didn't learn in 8th grade
• ...is a point on the origin
• ...is a point that is far outside the main cluster of points/ordered pairs
• ...is a group of points that are close together

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

• Graph A
• Graph B
• Graph C
• Graph D

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!)

What type of association does this scatter plot represent?

• positive linear association
• negative association
• no association
• nonlinear association

Is the point in red an outlier?

• Yes

• No

This graph has...

• Clusters

• outliers

Which graph represents data that has a correlation coefficient close to -1?

• 
• 
• 
• 

Which correlation coefficient indicates a stronger relationship: − 0.98 or 0.91?

• -0.98

• 0.91

The scatter plot shows the relationship between the number of chapters and the total number of pages for several books.  Use the trend line to predict how many chapters would be in a book with 180 pages. 

• 12 chapters
• 15 chapters
• 18 chapters
• 21 chapters