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

Which scatter plot shows a linear relationship between x and y?

• Graph A
• Graph B
• Graph C
• Graph D

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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? 

• A. 50 min
• B. 80 min
• C. 45 min
• D. 60 min

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

Make a prediction for a resting heart rate after 6 hours of exercise a week.

• 6
• 50
• 55
• 59

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

Which scatter plot shows a linear relationship between x and y?

• Graph A
• Graph B
• Graph C
• Graph D

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

What is the line of best fit?

• f(x)= 5x+1.82
• cannot be determined
• f(x)= 1.82x + 5.02
• f(x)= 1.1x + 4.2

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

Which scatter plot appears to be linear?

• Scatter plot A

• Scatter plot B

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

The number of newly reported crime cases in a county in New York State is shown in the accompanying table, where x represents the number of years since 1994, and y represents number of new cases. Write the linear regression equation that represents this set of data, rounding all coefficients to the nearest hundredth. Using this equation, find the projected number of new cases for 2003, rounded to the nearest whole number.

• 974

• 25,101

• 940

• 952

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

The scatter plot below shows the number of books read by students in Mrs. Hall’s English class and their final grades. Which statement represents the best description about the line of best fit?

• The more books students read, the lower their English grade.

• The more books students read, the higher their English grade.

• The fewer books students read, the higher their English grade.

• No relationship exists between the number of books students read and their English grades.

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

What is the equation of the line of best fit?

• y= $-\frac{1}{2}x\ +\ 6$

• y= $\frac{1}{2}x\ +6$

• y= 6x + 2

• y = -2x +6

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

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

• Yes

• No

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