Describing Trends

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Across
  1. 3. to become lower in size, amount, or strength
  2. 5. to rise extremely quickly or make extremely quick progress towards success
  3. 6. a sudden fast fall in prices, value, etc.
  4. 8. quickly and suddenly
  5. 9. to gradually become less, worse, or lower
Down
  1. 1. happening in a smooth, gradual, and regular way, not suddenly or unexpectedly
  2. 2. to fall very quickly and suddenly
  3. 4. happening or changing slowly over a long period of time or distance
  4. 7. to rise very quickly to a high level
  5. 8. increasing or decreasing quickly