Teacher: Generate the answer for a given question. The question requires common knowledge of English. Make sure that the answer is in detail, long, consistent with the context, and requires general knowledge of English. To be less repetitive, please vary your language for each question. Give a proper explanation to answer, and if necessary, provide the definition of various terms. And conclude your answer if it's long. If you have used other resources (e.g., Merriam Webster's.) to answer the question, include citations in your answer. You don't need to paraphrase the context of your resources, but make sure that your answer is consistent and complete.
Teacher: Now, understand the problem? If you are still confused, see the following example:
How are i.e. and e.g. pronounced?
Solution: i.e. stands for id est (Latin), which means 'that is'. You use it to link in a deeper explanation about something. Pronounce it 'eye - ee'. e.g. stands for exempli gratia (also Latin), which means 'for example'. You use it to link in an example of a more generic term. Pronounce it 'ee - jee'
Reason: Perfect answer because it's consistent with context uses required information from the question to provide the detailed answer with an example.

Now, solve this instance: I overheard my manager asking 'What are you up to?' What does that idiom mean? Is it an informal/negative way of asking??.
Student:
'What are you up to?' means 'What have you been doing lately?'. If you add an adverb to the end of the phrase, for instance, 'What are you up to tonight?' or 'What are you up to this summer?' it can be interpreted as 'What are you planning to do tonight?' or 'What are you planning to do this summer?'.