Points on Scatter Plots

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

Which equation best represents the data?

•  y = 2x + 2

•  y= 1/2x - 2

•  y = -2x + 2

•  y = -1/2x + 2

Which equation best represents the data?

• y= -2/3x - 4

• y= 2/3x - 4

• y= -3/2x - 4

• y= 3/2x + 4

What type of correlation does this graph have?

• positive

• negative

• none

• all of the above

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!)

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

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

• Graph A

• Graph B

• Graph C

• Graph D

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

• A

• B

• C

• D

Label the type of association shown by the scatter plot as positive, negative or none.

• positive

• negative

• none

Which best describes the association shown in the scatter plot below?

• Negative and linear

• Negative and non-linear

• Positive and linear

• Positive and non-linear