Scatterplots Line of Fit

Find the equation of the line of best fit for the given data

• y=163.41x+4.19

• y=-163.41x+4.19

• y=-4.19x+163.41

• y= 4.19x+(-163.41)
  

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

• A

• B

• C

• D

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

Find the slope from the table.

• -4

• 1

• 4

• -2

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

What is the best prediction for the number of candies in the jar when 30 students visit her?

• 90

• 180

• 135

• 150

Select the statement that best describes the line.

• The line is the line of best fit.

• The line is NOT a line of best fit because it does not pass through two points.

• The line is NOT a line of best fit because it does not go through the middle of the data set.

• The line is NOT a line of best fit because it does not go through the origin.

What type of association does this graph have?

• positive

• negative

• none

• all of the above

Which line appears to fit the data better?

• line A

• line B

A group of friends recorded the time it took to ride their bikes around the park. The scatterplot shows their results with the line of best fit.

Using the line of best fit, which is closer to the number of minutes it would take to complete 9 laps?

• 4

• 5

• 6

• 7