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Compare initial values of two functions

Grade 8 math · Fieldbook Learning

Name ______________________ Date __________

Find the y-intercept (initial value) of each function. In a table it is the y-value where x = 0. Write A or B.

  1. Function A is y = 2x + 11. Function B is shown in a table: x = 0, 1, 2, 3 and y = 6, 12, 18, 24. Which function has the greater y-intercept (initial value)? Write A or B.
  2. Function A is y = x + 4. Function B is shown in a table: x = 0, 1, 2, 3 and y = 9, 14, 19, 24. Which function has the greater y-intercept (initial value)? Write A or B.
  3. Function A is y = 5x + 1. Function B is shown in a table: x = 0, 1, 2, 3 and y = 8, 16, 24, 32. Which function has the greater y-intercept (initial value)? Write A or B.
  4. Function A is y = 7x + 4. Function B is shown in a table: x = 0, 1, 2, 3 and y = −9, −3, 3, 9. Which function has the greater y-intercept (initial value)? Write A or B.
  5. Function A is y = 4x + 8. Function B is shown in a table: x = 0, 1, 2, 3 and y = 6, 9, 12, 15. Which function has the greater y-intercept (initial value)? Write A or B.
  6. Function A is y = x + 1. Function B is shown in a table: x = 0, 1, 2, 3 and y = −5, 5, 15, 25. Which function has the greater y-intercept (initial value)? Write A or B.
  7. Function A is y = 12x − 2. Function B is shown in a table: x = 0, 1, 2, 3 and y = 13, 15, 17, 19. Which function has the greater y-intercept (initial value)? Write A or B.
  8. Function A is y = 9x − 11. Function B is shown in a table: x = 0, 1, 2, 3 and y = −4, 0, 4, 8. Which function has the greater y-intercept (initial value)? Write A or B.
  9. Function A is y = 14x + 3. Function B is shown in a table: x = 0, 1, 2, 3 and y = −3, 9, 21, 33. Which function has the greater y-intercept (initial value)? Write A or B.
  10. Function A is y = 11x + 17. Function B is shown in a table: x = 0, 1, 2, 3 and y = −7, 8, 23, 38. Which function has the greater y-intercept (initial value)? Write A or B.
  11. Function A is y = x. Function B is shown in a table: x = 0, 1, 2, 3 and y = 13, 25, 37, 49. Which function has the greater y-intercept (initial value)? Write A or B.
  12. Function A is y = x − 7. Function B is shown in a table: x = 0, 1, 2, 3 and y = 16, 31, 46, 61. Which function has the greater y-intercept (initial value)? Write A or B.
  13. Function A is y = 13x − 12. Function B is shown in a table: x = 0, 1, 2, 3 and y = 17, 22, 27, 32. Which function has the greater y-intercept (initial value)? Write A or B.
  14. Function A is y = 12x + 2. Function B is shown in a table: x = 0, 1, 2, 3 and y = −25, −7, 11, 29. Which function has the greater y-intercept (initial value)? Write A or B.
  15. Function A is y = 18x + 26. Function B is shown in a table: x = 0, 1, 2, 3 and y = −29, −20, −11, −2. Which function has the greater y-intercept (initial value)? Write A or B.
  16. Function A is y = 16x − 10. Function B is shown in a table: x = 0, 1, 2, 3 and y = −7, −6, −5, −4. Which function has the greater y-intercept (initial value)? Write A or B.
  17. Function A is y = 14x − 27. Function B is shown in a table: x = 0, 1, 2, 3 and y = −10, 17, 44, 71. Which function has the greater y-intercept (initial value)? Write A or B.
  18. Function A is y = 24x − 47. Function B is shown in a table: x = 0, 1, 2, 3 and y = 45, 53, 61, 69. Which function has the greater y-intercept (initial value)? Write A or B.
  19. Function A is y = 9x + 7. Function B is shown in a table: x = 0, 1, 2, 3 and y = 38, 50, 62, 74. Which function has the greater y-intercept (initial value)? Write A or B.
  20. Function A is y = 21x + 44. Function B is shown in a table: x = 0, 1, 2, 3 and y = 12, 29, 46, 63. Which function has the greater y-intercept (initial value)? Write A or B.
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Answer key: Compare initial values of two functions

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