Algebra Crossword puzzle

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Across
  1. 1. - a mathematical relationship between two variables where x corresponds to y
  2. 2. - a mathematical statement that shows the one value is greater or less than another
  3. 4. - the set of all possible output values for a function
  4. 7. - a measure of the steepness of a line
  5. 8. - a number that is multiplied by a variable
  6. 9. - the point where a line crosses an axis on a coordinate plane
  7. 11. - middle value in a list of numbers
  8. 14. - a symbol that represents a quantity
Down
  1. 1. - a number or expression that is multiplied by another number or expression
  2. 3. - a mathematical phrase that contains numbers, variables, and operations
  3. 5. - a mathematical statement that shows two expressions are equal
  4. 6. - the set of all possible input values for a function
  5. 10. - a fixed value that does not change
  6. 12. - shows a coordinate plane
  7. 13. - a part of an algebraic expression separated by signs