Interpret Lines of Best Fit

Is this line an accurate line of best fit for the data?

• Yes

• No

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

• A

• B

• C

• D

Which line would be the line of best fit?

• Green line (C)

• Orange line (B)

• Purple line (A)

• None of the above

Which line would be the line of best fit?

• Green line (C)

• Orange line (B)

• Purple line (A)

• None of them

What is the purpose of a line of best fit or a trend line?

• to make predictions

• to make the graph look pretty

• to connect the points

• to make it look like you know what you are doing

What type of correlation does this graph display?

• positive

• negative

• no correlation

• all of the above

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

• Graph A

• Graph B

• Graph C

• Graph D

What would be the equation for the line of best fit?

• y = ³/₄x + 9

• y = -¹/₂x + 9

• y = -³/₄x - 9

• y = -³/₄x + 9

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

What is the equation of the line of best fit?

• y = -25x + 170

• y = -5/8x + 170

• y = 25x + 170

• y = 5/8x + 170