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

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

• linear regression
• no correlation
• trend line
• line of best fit

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

What type of correlation does this graph have?

• positive
• negative
• none
• all of the above

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

As the age of the car increases, its value decreases. Which scatterplot represents this relationship?

• A
• B
• C
• D

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

Shelia collected data on ticket sales for the homecoming dance.  If she plots the data on the scatterplot shown above, which equation best models the table?

• y = 4.22x + 20.98
• y = 4.22x - 20.98
• y = -4.22x + 20.98
• y = -4.22x - 20.98

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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

As x increases, y increases

• correlation coefficient
• causation
• positive correlation
• negative correlation

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

This implies that one variable has a direct affect on the other variable.

• Correlation
• Causation

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

Mrs. Collins made a scatterplot to show the relationship between the number of absences and a student’s final exam score. Based on this scatterplot, a student with 12 absences should get approximately what score on the final exam?

• 60

• 92

• 70

• 76

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

Estimate the correlation coefficient for this scatterplot.

• A) r = 1.2

• B) r = 0.89

• C)r = 0

• D) r = -0.89

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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