Reegan's lovely Algebra II puzzle

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Across
  1. 4. a polynomial with 2 terms
  2. 8. a polynomial with 1 term
  3. 10. subspecies of the gray wolf
  4. 11. a small, carnivorous mammal
  5. 12. the type of function whose degree is 2
  6. 14. the lowest points of a graph
  7. 15. a point where a line touches the y-axis
  8. 17. a slope that is negative
  9. 19. the highest and lowest points of a graph
  10. 20. the type of function whose degree is 1
Down
  1. 1. the type of function whose degree is 3
  2. 2. a polynomial with 3 terms
  3. 3. a polynomial with 4 or more terms
  4. 5. a number that is used to express the terms of a square root to a negative number
  5. 6. a point where a line touches the x-axis
  6. 7. the highest points of a graph
  7. 9. a term with no variable
  8. 13. a slope that is positive
  9. 16. a number in front of the variable
  10. 18. the highest exponent in a polynomial