Erin's "fun" math crossword

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Across
  1. 2. m=Δy/Δx
  2. 3. the answer to an addition problem
  3. 4. the set of y coordinates
  4. 7. divide the largest value by the absolute value of the leading coefficient
  5. 8. the number of times that its associated factor (x-c) is in the polynomial
  6. 9. all possible rational zeros of a polynomial
  7. 13. combination of all the number system
  8. 15. is a set of points on a plane
  9. 17. number of positive and negative zeros
  10. 20. the thing under the square root symbol of the quadratic formula
  11. 23. are numbers that cannot be expressed as the ratio of two whole numbers
  12. 26. the set of x coordinates
  13. 28. the real number a₀
  14. 29. y-y₁=m(x-x₁)
Down
  1. 1. the real number aₙ
  2. 3. y=mx+b
  3. 5. the answer to a division problem
  4. 6. a^2+b^2+c^2
  5. 10. any numbers that can be expressed as the ratio of two whole numbers
  6. 11. the natural number n
  7. 12. the answer to a multiplication problem
  8. 14. c(x)=c(x)/(x)
  9. 16. the term aₙx^n
  10. 18. the all natural numbers plus zero
  11. 19. R(x)=x(p)(x)
  12. 21. the numbers consist of 1, 2, 3, 4, 5, …
  13. 22. first, outside, inside, last
  14. 24. in the answer to a subtraction problem
  15. 25. the real number c is a zero of the polynomial p(x) if and only if (x-c) is a factor of p
  16. 27. the set of natural numbers