Determine Trend Line of Scatterplot

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 140 pages. 

• 12 chapters

• 19 chapters

• 14 chapters

• 21 chapters

Choose the graph with a trend line that best fits the data.

• graph 1

• graph 2

• graph 3

• graph 4

What is a line of best fit used for?

• To make predictions

• To make the graph look pretty

• To connect the points

Level 1: Determine the type of correlation.

• Positive

• Negative

• No Correlation

Which graph shows the best trend line for the scatter plot?

• Graph A

• Graph B

• Graph C

• Graph D

Sammy is selling his comic book collection on the internet. The scatterplot shows how many comic books he has left at the end of each day. Using the trend line, how many comic books should Sammy have left after 6 days?

• 15

• 10

• 30

• 8

Which of the following would be the most accurate equation for the scatter plot?

• y = -2x - 7

• y = -x + 7

• y = 3x + 7

• y = 25x + 7

Which equation best represents the data?

•  y= -3/5x + 2

•  y = 5/3x -2 

•  y = -3/5x - 2

•  y= 5/3x + 2

Which scatter plot could have a trend line whose equation is y hat= 3x + 10?

• A

• B

• C

• D

Sammy is selling his comic book collection on the internet. The scatterplot shows how many comic books he has left at the end of each day. Using the trend line, after how many days should Sammy predict to have 10 comic books left?

• 8

• 0

• 9

• 2