Below is an instruction that describes a task. Write a response that appropriately completes the request.

### Instruction:
What rank by average has 1 dance on season 9?

### Inputs:
table_name: table, columns: ['Rank by average', 'Place', 'Perfect 40s', 'Total', 'Number of dances', 'Season', 'Average']

### Response:
SELECT Rank by average FROM table WHERE Number of dances = 1 AND Season = 9