math

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Across
  1. 4. a letter
  2. 10. to take away
  3. 11. little number
  4. 12. rate of change
  5. 14. to multiply
  6. 15. two lines that never touch
Down
  1. 1. a number multiplied by itself
  2. 2. big number
  3. 3. a straight line
  4. 5. y values
  5. 6. to add to
  6. 7. terms that are similar
  7. 8. where two lines meet
  8. 9. has four quadrents
  9. 13. all real numbers