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Slope of a line of best fit from two points

Grade 8 math · Fieldbook Learning

Name ______________________ Date __________

Slope = change in y ÷ change in x between the two points.

  1. A line of best fit passes through (4, 30) and (5, 34), where x is the number of weeks of training. What is its slope?
  2. A line of best fit passes through (1, 21) and (6, 51), where x is the number of minutes of practice. What is its slope?
  3. A line of best fit passes through (2, 49) and (8, 85), where x is the number of hours worked. What is its slope?
  4. A line of best fit passes through (2, 29) and (8, 71), where x is the number of minutes of practice. What is its slope?
  5. A line of best fit passes through (2, 18) and (4, 28), where x is the number of hours worked. What is its slope?
  6. A line of best fit passes through (7, 56) and (8, 64), where x is the number of hours worked. What is its slope?
  7. A line of best fit passes through (5, 45) and (10, 85), where x is the number of minutes of practice. What is its slope?
  8. A line of best fit passes through (10, 101) and (15, 141), where x is the number of hours worked. What is its slope?
  9. A line of best fit passes through (14, 171) and (15, 181), where x is the number of weeks of training. What is its slope?
  10. A line of best fit passes through (4, 33) and (11, 40), where x is the number of weeks of training. What is its slope?
  11. A line of best fit passes through (15, 41) and (22, 55), where x is the number of weeks of training. What is its slope?
  12. A line of best fit passes through (11, 83) and (24, 174), where x is the number of minutes of practice. What is its slope?
  13. A line of best fit passes through (13, 277) and (19, 397), where x is the number of weeks of training. What is its slope?
  14. A line of best fit passes through (15, 245) and (25, 405), where x is the number of hours worked. What is its slope?
  15. A line of best fit passes through (3, 40) and (12, 139), where x is the number of minutes of practice. What is its slope?
  16. A line of best fit passes through (18, 127) and (30, 211), where x is the number of weeks of training. What is its slope?
  17. A line of best fit passes through (19, 176) and (44, 401), where x is the number of weeks of training. What is its slope?
  18. A line of best fit passes through (19, 395) and (26, 535), where x is the number of minutes of practice. What is its slope?
  19. A line of best fit passes through (15, 361) and (34, 798), where x is the number of weeks of training. What is its slope?
  20. A line of best fit passes through (26, 353) and (52, 691), where x is the number of weeks of training. What is its slope?
More free practice: fieldbooklearning.com/ca/practice/grade-8/slope-of-a-line-of-best-fit-from-two-points/

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Answer key: Slope of a line of best fit from two points

  1. 4
  2. 6
  3. 6
  4. 7
  5. 5
  6. 8
  7. 8
  8. 8
  9. 10
  10. 1
  11. 2
  12. 7
  13. 20
  14. 16
  15. 11
  16. 7
  17. 9
  18. 20
  19. 23
  20. 13