chapter 3 math puzzle

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Across
  1. 4. the two axes on a coordinate plane intersect
  2. 5. the vertical number line on a coordinate plane
  3. 7. integers any integer less than zero
  4. 8. vaule a distance from zero
Down
  1. 1. the four regions of the coordinate plane
  2. 2. integer any integer greater than zero
  3. 3. the horizontal line on a coordinate plane
  4. 6. the set of whole numbers and their opposites