maths crossword

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Across
  1. 2. the highest power of the variable in a
  2. 5. the point of intersection of medians of a triangle is called
  3. 8. the measure of certainty or uncertainty
  4. 9. Y coordinate of a point is called
Down
  1. 1. Probability of an impossible event
  2. 3. the set of outcomes of an experiment
  3. 4. X coordinate of a point is called
  4. 6. the numbers which cannot be defined in the p/q form
  5. 7. a polynomial with degree 2 is called ______ polynomial