Identifying Correlation

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

• A

• B

• C

• D

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

• Yes

• No

Which graph shows a line of best fit for the scatter plot?

• Graph A

• Graph B

• Graph C

• Graph 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

Based on this scatterplot, approximate what score should a student who attended class 22 days expect to receive on the exam?

• 84

• 71

• 95

• 75

The following scatter plot shows Pam's training as she prepares to run a 6 mile race at the end of the month.  Which of the following would be a reasonable approximation for the length of time it would take for her to run 6 miles?

• 50 min

• 80 min

• 45 min

• 60 min

A trend line that shows the most accurate relationship between x and y describes...

• linear regression

• no correlation

• trend line

• line of best fit

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

• A

• B

• C

• D

The red line represents the line of best fit for the scatter plot. How many ice cream sales are expected if the temperature is 90°?

• 55

• 0

• 103

• 100

What is the equation of the line of best fit?

• y= 6x + 2

• y = -2x +6