Christmas Tree Crossword

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Across
  1. 7. the output variable (range)
  2. 9. a ratio of 2 sides of a right triangle
  3. 10. a mathematical statement where 2 expressions are equal
  4. 11. a phrase that represents a value
  5. 13. to have the same measure
  6. 15. a group of equations
  7. 18. the x-term in an ordered pair
  8. 19. the set of all the y-terms in a relation
Down
  1. 1. the input variable (domain)
  2. 2. the vector that joins the initial point of one vector to the terminal point of another
  3. 3. the imaginary horizontal from one point to another
  4. 4. the ratio of the change in y over the change in x
  5. 5. the y-term in an ordered pair
  6. 6. a special type of relation where the x-term is paired with exactly one y-term
  7. 7. the set of all the x-terms in a relation
  8. 8. a set of ordered pairs
  9. 12. triangle with at least 2 congruent sides
  10. 14. an equation in which the coefficients and constants have been replaced by letters
  11. 16. using mathematics to describe and analyze a real world situation
  12. 17. triangle measure