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Use a line of best fit to predict

Year 8 maths · Fieldbook Learning

Name ______________________ Date __________

Put the value of x into the equation of the line of best fit.

  1. A line of best fit for temperature (x) and ice creams sold (y) is y = 7x + 38. Use it to predict y when x = 2.
  2. A line of best fit for age of a car (x) and its price (y) is y = 9x + 28. Use it to predict y when x = 10.
  3. A line of best fit for hours studied (x) and test score (y) is y = 8x + 31. Use it to predict y when x = 8.
  4. A line of best fit for age of a car (x) and its price (y) is y = 6x + 15. Use it to predict y when x = 11.
  5. A line of best fit for hours studied (x) and test score (y) is y = 12x + 23. Use it to predict y when x = 3.
  6. A line of best fit for hours of sleep (x) and minutes to fall asleep (y) is y = 12x + 56. Use it to predict y when x = 15.
  7. A line of best fit for hours studied (x) and test score (y) is y = 12x + 41. Use it to predict y when x = 10.
  8. A line of best fit for age of a car (x) and its price (y) is y = 5x + 30. Use it to predict y when x = 12.
  9. A line of best fit for age of a car (x) and its price (y) is y = 15x + 17. Use it to predict y when x = 5.
  10. A line of best fit for shoe size (x) and height (y) is y = 8x + 63. Use it to predict y when x = 12.
  11. A line of best fit for age of a car (x) and its price (y) is y = 4x + 51. Use it to predict y when x = 10.
  12. A line of best fit for temperature (x) and ice creams sold (y) is y = 10x + 27. Use it to predict y when x = 17.
  13. A line of best fit for temperature (x) and ice creams sold (y) is y = 18x + 40. Use it to predict y when x = 5.
  14. A line of best fit for age of a car (x) and its price (y) is y = 7x + 13. Use it to predict y when x = 6.
  15. A line of best fit for shoe size (x) and height (y) is y = 16x + 66. Use it to predict y when x = 5.
  16. A line of best fit for shoe size (x) and height (y) is y = 2x + 39. Use it to predict y when x = 17.
  17. A line of best fit for temperature (x) and ice creams sold (y) is y = 26x + 142. Use it to predict y when x = 10.
  18. A line of best fit for hours of sleep (x) and minutes to fall asleep (y) is y = 21x + 46. Use it to predict y when x = 2.
  19. A line of best fit for shoe size (x) and height (y) is y = 14x + 67. Use it to predict y when x = 28.
  20. A line of best fit for age of a car (x) and its price (y) is y = 10x + 21. Use it to predict y when x = 3.
More free practice: fieldbooklearning.com/au/practice/year-8/use-a-line-of-best-fit-to-predict/

Play it as a quiz game

18 of these questions as multiple choice, with near-miss wrong answers, ready for Kahoot or Blooket.

  1. Download the game's own question template: in Kahoot, Add question → Import spreadsheet; in Blooket, Create a set → Spreadsheet import.
  2. Click the matching button below, then click the first empty question row of the template and paste.
  3. Save the template (Kahoot needs .xlsx, Blooket .csv) and upload it.
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Answer key: Use a line of best fit to predict

  1. 52
  2. 118
  3. 95
  4. 81
  5. 59
  6. 236
  7. 161
  8. 90
  9. 92
  10. 159
  11. 91
  12. 197
  13. 130
  14. 55
  15. 146
  16. 73
  17. 402
  18. 88
  19. 459
  20. 51