The Maths Crossword Puzzle

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Across
  1. 2. The horizontal number line (6 letters)
  2. 5. The equation for a straight line (y = mx + b) (4 letters)
  3. 7. The x-axis intersects the y-axis at this point (6 letters)
  4. 9. A polynomial with two terms (8 letters)
  5. 10. The intersection of two lines (5 letters)
  6. 12. Opposite of positive (8 letters)
  7. 13. The set of all real numbers (5 letters)
Down
  1. 1. A number divisible by both 2 and 3 (9 letters)
  2. 3. Combining like terms (11 letters)
  3. 4. The vertical number line (6 letters)
  4. 6. The distance between two points (8letters)
  5. 8. The answer to an equation (4 letters)
  6. 11. The highest power of a variable in a polynomial (6 letters)