Pi Day Crossword Puzzle

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Across
  1. 2. vertical line on a graph
  2. 3. b is the y-________
  3. 5. horizontal line on a graph
  4. 6. opposite of positive
  5. 9. type of math
  6. 10. (x,y)
Down
  1. 1. dot on a graph
  2. 4. opposite of negative
  3. 7. y _____ mx+b
  4. 8. x is the ______