Reading a Scatter Plot

Which statement about the scatter plot is true?

• There is no association between x and y.

• There is a positive, linear association between x and y.

• There is a negative, linear association between x and y.

• There is a nonlinear association between x and y.

Which of these most closely approximates a line of best fit for the data in the scatter plot?

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• 
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A graph is drawn by a student representing number of people on the x−axis and hours worked per week on the y−axis. Which of the following options represents the association shown by this graph.

• Weak and non linear

• Negative and Non linear

• Weak and negative

• No association

In the scatter plot for calories burned and minutes of exercise (the same one from question six), what is the context of the outliers present?

• The person who exercised for 140 minutes burned 150 calories.

• The person who exercised for 150 minutes burned 140 calories.

• The person who exercised for 180 minutes burned 450 calories.

• Not applicable - there is no outlier.

What type of association (correlation) does this graph have?

• positive

• negative

• none

• all of the above

What type of association does this scatter plot represent?

• positive linear association

• negative linear association

• no association

• nonlinear association

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

What type of correlation does this graph have?

• positive 

• negative

• none

• all of the above

Estimate the correlation coefficient for this scatterplot.

• r = 1.2

• r = 0.89

• r = 0

• r = -0.89

Estimate the correlation coefficient for this scatterplot.

• r = -0.9

• r = 1

• r = 0.9

• r = -1