Math Puzzle

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Across
  1. 4. top of a fraction
  2. 7. rows x columns
  3. 8. function that increases as x does
  4. 9. x values
  5. 10. sum of the terms of a sequence
  6. 11. less than a whole number
Down
  1. 1. bottom of a fraction
  2. 2. each value in a matrix
  3. 3. function that decreases as x does
  4. 4. number less than zero
  5. 5. y values
  6. 6. rectangular array of numbers enclosed in brackets