Gen Math cross word puzzle

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Across
  1. 1. Ordered Pairs
  2. 4. Constant
  3. 6. Substraction
  4. 7. Graph
  5. 10. Substitute
  6. 11. Many-to-one
  7. 13. Quadratic
  8. 15. Maping
  9. 17. Equal
  10. 18. Range
  11. 19. Function
Down
  1. 1. Origin
  2. 2. Addition
  3. 3. Numerator
  4. 5. One-to-one
  5. 8. Raise
  6. 9. Division
  7. 12. Rational
  8. 14. Domain
  9. 16. Vertex