C3 Crossword Puzzle

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Across
  1. 2. the four regions of a coordinate plane
  2. 3. a reference line drawn on a graph
  3. 7. the vertical number line of a coordinate plane
  4. 9. the horizontal number line of the coordinate plane
  5. 10. two numbers that are the same distance from zero on a number line, but in opposite directions
  6. 12. a surface formed by the intersection of two number lines
Down
  1. 1. a number's distance from 0 on a number line
  2. 4. a math sentence that contains <, >, ≤, ≥, or ≠
  3. 5. the point on a coordinate plane where two number lines intersect
  4. 6. a pair of numbers that describe the location of a point in a coordinate plane
  5. 8. in math, the numerical worth or amount
  6. 11. all positive and negative whole numbers, including zero