Linear Equations Crossword

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Across
  1. 3. Perpendicular to a vertical line
  2. 5. When a slope is less than one it is
  3. 7. When a slope is more than one it is
  4. 10. Two lines that never intersect at any given time
  5. 12. At an angle of 90 degrees to a given line, plane or surface
  6. 13. A shift that shifts left or right
  7. 14. Transforming a fraction division to multiplication
  8. 15. A type of equation that makes a straight line
Down
  1. 1. Bold horizontal line on a graph
  2. 2. A shift that shifts up or down
  3. 4. A type of angle at 90 degrees
  4. 6. The multiplicative inverse of a fraction
  5. 8. Bold vertical line on a graph
  6. 9. Where x-axis and y-axis intercept
  7. 11. Perpendicular to a horizontal line