all year math puzzle

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Across
  1. 2. u-shape curve on graph
  2. 4. y=mx+b
  3. 8. something that is likely to change
  4. 11. a formula to find any term in a sequence given the previous term, a(n-1)
  5. 12. two quantities that are not the same measure or amount
  6. 13. a set of numbers arranged in a special order
  7. 14. A sequence of numbers created by repeated multiplication
  8. 16. most frequently number/none or more than 1
  9. 19. y-intercepts will be different numbers or the same
  10. 20. add and divide by 2
Down
  1. 1. difference between highest number and lowest number
  2. 3. A sequence of terms created by repeated addition.
  3. 5. A number by itself without any variables
  4. 6. to replace something
  5. 7. a formula to find any term in a sequence given the term number, n
  6. 9. Grouping symbols, Exponents, Multiplication, Division, Addition, Subtraction
  7. 10. two lines that never touch and have the same slope
  8. 15. absolute value, distance from zero
  9. 17. highest or lowest point on a parabola
  10. 18. facts or information collected by people