Final answer:
To change the question 'When are you leaving?' into reported speech, you need to use reporting verbs. In this case, the verb 'asked' is appropriate. So the reported speech would be: She asked when you were leaving.
Step-by-step explanation:
To change the question 'When are you leaving?' into reported speech, you need to use reporting verbs. In this case, the verb 'asked' is appropriate. So the reported speech would be:
She asked when you were leaving.