function

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Across
  1. 3. y=x
  2. 5. infinite_solutions
  3. 6. y=mx
  4. 9. curved_quadratic_line
  5. 10. flipped_line
  6. 11. direct_cause_effect
  7. 12. line_collide_axis
  8. 13. two_lines_collide
Down
  1. 1. upwards_slope
  2. 2. certain_point/points_after_solving
  3. 4. downwards_slope
  4. 5. non_direct_cause_effect
  5. 7. Line_of_same_slope
  6. 8. x_squared
  7. 9. y=x_or_y=x^2