Math Crossword!

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Across
  1. 3. Lines with a single point of intersection
  2. 5. Set of inputs
  3. 8. Whole numbers positive starting at 1
  4. 9. Set of outputs
  5. 10. Numbers that go on forever and can't be rewritten as a fraction
  6. 11. Use when you have both the slope and the y-intercept of both lines
  7. 13. A number that can be rewritten as a fraction
  8. 14. Parralel lines on a graph
  9. 15. A relation where each input has exactly one output
Down
  1. 1. Set of inputs and outputs
  2. 2. Lines on top of one another
  3. 4. Method used when lines are in standard form
  4. 6. Natural numbers including 0
  5. 7. Whole numbers including 0
  6. 12. Use when y-intercept is already given in one equation