Ian Smith - Calculus Puzzle

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Across
  1. 2. represented by a small open circle
  2. 6. no derivative exists at a value due to an asymptote blocking the value
  3. 7. another word for slope
  4. 8. a combination of a real number and an imaginary number
  5. 9. no derivative exists at a value due to a break in the function
  6. 10. the point at which the faces of a pyramid meet
  7. 11. the line the function approaches but never crosses
  8. 13. the distance between two intersections on a tangent curve
  9. 14. the graph can be drawn without lifting a pencil
  10. 15. the line the function approaches but never crosses has a value of x
Down
  1. 1. the line the function approaches but never crosses has a value of y
  2. 3. intended height at a given value
  3. 4. no derivative exists at a value due to a missing point in the function
  4. 5. the expression under the radical in the quadratic formula
  5. 12. instantaneous rate of change