EOY Crossword puzzle

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Across
  1. 2. A letter symbol used in place of a quantity
  2. 6. A value that does not change
  3. 10. A number that cannot be written as a simple fraction
  4. 12. a literal equation that states a rule for a relationship among quantities
  5. 14. commonly referred to as the steepness of a line
  6. 17. A number attached to a variable
  7. 18. Not straight lines when graphed
  8. 19. the number of times the base number
Down
  1. 1. has a X with no exponent
  2. 3. the independent variable
  3. 4. a change of position or size of a figure
  4. 5. All whole numbers and their negative
  5. 7. a comparison of two quantities
  6. 8. Finding what to multiply to get an expression
  7. 9. the dependent variable
  8. 11. The second elements in a relation
  9. 13. Value a numbers distance from zero on the number line
  10. 15. X and y axes intersect
  11. 16. A set first of elements in a relation
  12. 20. Has an X as exponential