Algebra 1 Puzzle

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Across
  1. 3. difference between the lowest and highest values.
  2. 4. numbers that can be expressed as a fraction
  3. 5. a factor of a number that, when multiplied by itself, gives the original number.
  4. 6. the set of all possible inputs for the function.
  5. 10. a statement that the values of two mathematical expressions are equal
  6. 11. an assignment of values to the unknown variables that makes the equality in the equation true
  7. 14. made up of exactly similar parts facing each other or around an axis
  8. 15. an expression which is composed of variables, constants and exponents
Down
  1. 1. of change how much one quantity changes in relation to another.
  2. 2. make or become smaller or fewer in size
  3. 7. the middle number in a sorted list of numbers
  4. 8. the greatest or highest amount
  5. 9. one value is smaller than another.
  6. 12. a surface of which one end or side is at a higher level than another
  7. 13. a graph summarising a set of data.