Let's say I take age and income of everyone in a city and train a regression model that predicts income from age. The model has slope and intercept that "encode

Let's say I take age and income of everyone in a city and train a regression model that predicts income from age. The model has slope and intercept that "encode" the information from all the people. It would not be possible to make inferences about the income of any particular person from the slope and intercept, so it would be ok to share those values in, say, a journal article, even though disclosing income of a particular person would not be ok.