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Common Core 8.SP.A.2 worksheet

8th grade (Year 9 in England) · 16 questions · Common Core: 8.SP.A.1, 8.SP.A.2, 8.SP.A.3 · England: KS3 Statistics, GCSE Foundation Statistics

Name

Date

Score/ 16

  1. Question 1

    The line of best fit for hours studied (x) and test score (y) is y = 2x + 2. Predict the score for 9 hours of study.

    xy246810121481624324048566472800y = 2x + 2

    Answer

  2. Question 2

    Maya plotted two measurements for 8 plants in a scatter graph. What type of correlation does it show?

    xy24681024681012140(1, 9)(2, 8)(3, 7)(4, 7)(5, 7)(6, 5)(7, 3)(8, 2)
    • A. Positive
    • B. Negative
    • C. No correlation

  3. Question 3

    A line of best fit is y = 3x + 1. For which x does it predict y = 19?

    Answer

  4. Question 4

    The line of best fit for test score (y) against hours of practice (x) is y = 6x + 21. Predict the score after 9 hours.

    Answer

  5. Question 5

    Data was collected for x from 1 to 8, and the line of best fit is y = 4x + 5. Chloe uses it to predict y when x = 37. Why should Chloe be careful?

    xy123456789101530450y = 4x + 5(1, 8)(2, 12)(3, 19)(4, 21)(5, 25)(6, 29)(7, 35)(8, 39)
    • A. Lines of best fit can never be used
    • B. The line has a positive slope
    • C. x is far outside the data range, so the trend may not continue
    • D. The answer will be a decimal

  6. Question 6

    The line of best fit for hours studied (x) and test score (y) is y = 3x + 5. Predict the score for 8 hours of study.

    xy246810121481624324048566472800y = 3x + 5

    Answer

  7. Question 7

    Isla plotted two measurements for 8 plants in a scatter graph. What type of correlation does it show?

    xy24681024681012140(1, 2)(2, 9)(3, 4)(4, 10)(5, 3)(6, 8)(7, 5)(8, 6)
    • A. Positive
    • B. Negative
    • C. No correlation

  8. Question 8

    A line of best fit is y = 1.5x + 2. For which x does it predict y = 14?

    Answer

  9. Question 9

    The line of best fit for test score (y) against hours of practice (x) is y = 6x + 25. Predict the score after 9 hours.

    Answer

  10. Question 10

    Data was collected for x from 1 to 8, and the line of best fit is y = 5x + 10. Priya uses it to predict y when x = 53. Why should Priya be careful?

    xy1234567891028560y = 5x + 10(1, 15)(2, 19)(3, 27)(4, 28)(5, 36)(6, 38)(7, 44)(8, 49)
    • A. The line has a positive slope
    • B. Lines of best fit can never be used
    • C. The answer will be a decimal
    • D. x is far outside the data range, so the trend may not continue

  11. Question 11

    The line of best fit for hours studied (x) and test score (y) is y = 3x + 7. Predict the score for 6 hours of study.

    xy246810121481624324048566472800y = 3x + 7

    Answer

  12. Question 12

    Amara plotted two measurements for 8 plants in a scatter graph. What type of correlation does it show?

    xy24681024681012140(1, 10)(2, 8)(3, 7)(4, 8)(5, 7)(6, 4)(7, 3)(8, 4)
    • A. Positive
    • B. Negative
    • C. No correlation

  13. Question 13

    A line of best fit is y = 1x + 7. For which x does it predict y = 14?

    Answer

  14. Question 14

    The line of best fit for test score (y) against hours of practice (x) is y = 6x + 24. Predict the score after 5 hours.

    Answer

  15. Question 15

    Data was collected for x from 1 to 8, and the line of best fit is y = 5x + 8. Ines uses it to predict y when x = 30. Why should Ines be careful?

    xy1234567891028560y = 5x + 8(1, 11)(2, 19)(3, 23)(4, 28)(5, 32)(6, 37)(7, 41)(8, 50)
    • A. The answer will be a decimal
    • B. The line has a positive slope
    • C. Lines of best fit can never be used
    • D. x is far outside the data range, so the trend may not continue

  16. Question 16

    The line of best fit for hours studied (x) and test score (y) is y = 5x + 6. Predict the score for 9 hours of study.

    xy246810121481624324048566472800y = 5x + 6

    Answer

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Answer key: Common Core 8.SP.A.2 worksheet

  1. 1. 20

  2. 2. B. Negative

  3. 3. 6

  4. 4. 75

  5. 5. C. x is far outside the data range, so the trend may not continue

  6. 6. 29

  7. 7. C. No correlation

  8. 8. 8

  9. 9. 79

  10. 10. D. x is far outside the data range, so the trend may not continue

  11. 11. 25

  12. 12. B. Negative

  13. 13. 7

  14. 14. 54

  15. 15. D. x is far outside the data range, so the trend may not continue

  16. 16. 51

8.SP.A.2 Worksheet: Scatter graphs and correlation | Eurekami