CCSS.Math.Content.8.SP.A.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

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CCSS.Math.Content.8.SP.A.2

What type of association does this graph have?

• positive 
• negative
• none
• all of the above

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CCSS.Math.Content.8.SP.A.2

Estimate the correlation coefficient for this scatterplot.

• r = 1.2
• r = 0.89
• r = 0
• r = - 0.89

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CCSS.Math.Content.8.SP.A.2

If the debate team practiced for only 1 hour, how many debates are they expected to win?

• 2
• 6
• 10
• 14

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CCSS.Math.Content.8.SP.A.2

As x increases, y decreases.

• A) no correlation

• B) negative correlation

• C) correlation coefficient

• D) positive correlation

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CCSS.Math.Content.8.SP.A.2

You are analyzing a scatter plot that has a negative correlation. What is true of the of the x and y values?

• As x increases, y decreases
• As x increases, y increases
• As x decreases, y decreases

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CCSS.Math.Content.8.SP.A.2

What is Bivariate Data?

• A set of data that shows a relationship between two variables.

• A set of data that shows a relationship between three variables.

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CCSS.Math.Content.8.SP.A.2

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

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CCSS.Math.Content.8.SP.A.2

Which could be a good Line of Best fit?

• a

• b

• c

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CCSS.Math.Content.8.SP.A.2

The scatterplot shows the average number of hours each of 13 people spends at work every week and the average number of hours each of them spends on recreational activities every week.

Based on the scatterplot, what is the best prediction of the average number of hours a person spends at work every week if that person spends an average of 10 hours on recreational activities every week?

• 33 h

• 85 h

• 50 h

• 65 h

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CCSS.Math.Content.8.SP.A.2