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What the intercept of a line of best fit means

Grade 8 math · Fieldbook Learning

Name ______________________ Date __________

The y-intercept is the predicted y when x is 0.

  1. A line of best fit for shoe size (x) and height (y) is y = 6x + 23. What y does the line predict when x = 0?
  2. A line of best fit for shoe size (x) and height (y) is y = 8x + 12. What y does the line predict when x = 0?
  3. A line of best fit for temperature (x) and ice creams sold (y) is y = 8x + 60. What y does the line predict when x = 0?
  4. A line of best fit for hours studied (x) and test score (y) is y = 6x + 20. What y does the line predict when x = 0?
  5. A line of best fit for age of a car (x) and its price (y) is y = 5x + 42. What y does the line predict when x = 0?
  6. A line of best fit for hours studied (x) and test score (y) is y = 3x + 69. What y does the line predict when x = 0?
  7. A line of best fit for shoe size (x) and height (y) is y = 7x + 12. What y does the line predict when x = 0?
  8. A line of best fit for temperature (x) and ice creams sold (y) is y = 8x + 38. What y does the line predict when x = 0?
  9. A line of best fit for age of a car (x) and its price (y) is y = 14x + 34. What y does the line predict when x = 0?
  10. A line of best fit for hours of sleep (x) and minutes to fall asleep (y) is y = 11x + 28. What y does the line predict when x = 0?
  11. A line of best fit for shoe size (x) and height (y) is y = 15x + 42. What y does the line predict when x = 0?
  12. A line of best fit for shoe size (x) and height (y) is y = 15x + 14. What y does the line predict when x = 0?
  13. A line of best fit for hours of sleep (x) and minutes to fall asleep (y) is y = 17x + 30. What y does the line predict when x = 0?
  14. A line of best fit for hours of sleep (x) and minutes to fall asleep (y) is y = 15x + 103. What y does the line predict when x = 0?
  15. A line of best fit for temperature (x) and ice creams sold (y) is y = 8x + 23. What y does the line predict when x = 0?
  16. A line of best fit for temperature (x) and ice creams sold (y) is y = 11x + 34. What y does the line predict when x = 0?
  17. A line of best fit for temperature (x) and ice creams sold (y) is y = 15x + 44. What y does the line predict when x = 0?
  18. A line of best fit for shoe size (x) and height (y) is y = 26x + 37. What y does the line predict when x = 0?
  19. A line of best fit for shoe size (x) and height (y) is y = 4x + 148. What y does the line predict when x = 0?
  20. A line of best fit for temperature (x) and ice creams sold (y) is y = 11x + 58. What y does the line predict when x = 0?
More free practice: fieldbooklearning.com/ca/practice/grade-8/what-the-intercept-of-a-line-of-best-fit-means/

Play it as a quiz game

17 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: What the intercept of a line of best fit means

  1. 23
  2. 12
  3. 60
  4. 20
  5. 42
  6. 69
  7. 12
  8. 38
  9. 34
  10. 28
  11. 42
  12. 14
  13. 30
  14. 103
  15. 23
  16. 34
  17. 44
  18. 37
  19. 148
  20. 58