Math I Line of Best Fit

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

• Graph A

• Graph B

• Graph C

• Graph D

What is a line of best fit used for?

• To make predictions

• To make the graph look pretty

• To connect the points

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

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

• Yes

• No

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

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

• A

• B

• C

• D

Tags

Scatter Plots

Line of Best Fit

Statistics

What is the equation of the line of best fit?

• y= 6x + 2

• y = -2x +6

• This residual plot represents a linear fit.
• This residual plot represents a nonlinear fit.
• This residual plot represents no fit.

• 617.51 miles

• 621.09 miles

• 100 miles

• 0.19 miles

Shown is a residual plot. How many positive residuals are there?

• 5

• 1

• 3

• 9

What is the equation of the line of best fit

• y= -2x + 10

• y= 10x+ 2

• y= 10