FreeMath
Grade 8hard

Domain and Range Practice

Practice identifying domain (input values) and range (output values) of functions. Domain is all x-values; range is all y-values.

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All 20 Practice Problems

Every question in this set. Solve them on paper, or use the interactive tool above for instant feedback and hints.

  1. 1.Points: (1,4), (2,5), (3,6). Domain = ?
  2. 2.Points: (1,4), (2,5), (3,6). Range = ?
  3. 3.Points: (0,1), (1,3), (2,5), (3,7). Domain = ?
  4. 4.Points: (0,1), (1,3), (2,5), (3,7). Range = ?
  5. 5.f(x) = x². If x ∈ {-2,-1,0,1,2}, range = ?
  6. 6.Points: (-1,5), (0,3), (1,5), (2,7). Domain = ?
  7. 7.Points: (-1,5), (0,3), (1,5), (2,7). Range = ?
  8. 8.f(x) = 2x. If domain = {0,1,2,3}, range = ?
  9. 9.Points: (2,4), (4,4), (6,4). Domain = ?
  10. 10.Points: (2,4), (4,4), (6,4). Range = ?
  11. 11.f(x) = x + 1. If domain = {-1,0,1}, range = ?
  12. 12.Points: (5,0), (5,1), (5,2). Is this a function?
  13. 13.f(x) = 3x - 2. If domain = {1,2,3}, range = ?
  14. 14.Points: (1,2), (2,4), (3,6), (4,8). Domain = ?
  15. 15.Points: (1,2), (2,4), (3,6), (4,8). Range = ?
  16. 16.f(x) = x². If domain = {-3,-2,-1,0}, range = ?
  17. 17.Points: (0,0), (1,1), (2,4), (3,9). Domain = ?
  18. 18.Points: (0,0), (1,1), (2,4), (3,9). Range = ?
  19. 19.f(x) = |x|. If domain = {-2,-1,0,1,2}, range = ?
  20. 20.Points: (3,5), (4,5), (5,5). Is this a function?
Show answer key
  1. 1.Points: (1,4), (2,5), (3,6). Domain = ? Answer: {1, 2, 3}
  2. 2.Points: (1,4), (2,5), (3,6). Range = ? Answer: {4, 5, 6}
  3. 3.Points: (0,1), (1,3), (2,5), (3,7). Domain = ? Answer: {0, 1, 2, 3}
  4. 4.Points: (0,1), (1,3), (2,5), (3,7). Range = ? Answer: {1, 3, 5, 7}
  5. 5.f(x) = x². If x ∈ {-2,-1,0,1,2}, range = ? Answer: {0, 1, 4}
  6. 6.Points: (-1,5), (0,3), (1,5), (2,7). Domain = ? Answer: {-1, 0, 1, 2}
  7. 7.Points: (-1,5), (0,3), (1,5), (2,7). Range = ? Answer: {3, 5, 7}
  8. 8.f(x) = 2x. If domain = {0,1,2,3}, range = ? Answer: {0, 2, 4, 6}
  9. 9.Points: (2,4), (4,4), (6,4). Domain = ? Answer: {2, 4, 6}
  10. 10.Points: (2,4), (4,4), (6,4). Range = ? Answer: {4}
  11. 11.f(x) = x + 1. If domain = {-1,0,1}, range = ? Answer: {0, 1, 2}
  12. 12.Points: (5,0), (5,1), (5,2). Is this a function? Answer: No
  13. 13.f(x) = 3x - 2. If domain = {1,2,3}, range = ? Answer: {1, 4, 7}
  14. 14.Points: (1,2), (2,4), (3,6), (4,8). Domain = ? Answer: {1, 2, 3, 4}
  15. 15.Points: (1,2), (2,4), (3,6), (4,8). Range = ? Answer: {2, 4, 6, 8}
  16. 16.f(x) = x². If domain = {-3,-2,-1,0}, range = ? Answer: {0, 1, 4, 9}
  17. 17.Points: (0,0), (1,1), (2,4), (3,9). Domain = ? Answer: {0, 1, 2, 3}
  18. 18.Points: (0,0), (1,1), (2,4), (3,9). Range = ? Answer: {0, 1, 4, 9}
  19. 19.f(x) = |x|. If domain = {-2,-1,0,1,2}, range = ? Answer: {0, 1, 2}
  20. 20.Points: (3,5), (4,5), (5,5). Is this a function? Answer: Yes

About This Practice

This practice set includes 20 domain and range problems. Understanding domain and range is essential for analyzing and graphing functions.

Want more practice? See all Grade 8 practice →