Death of A Salesman

At the end of Act I, Linda asks Willy (about Biff) 'What has he got against you?' Throughout Act I, in both real time and flashbacks, Linda seems to have a lot on her mind yet says little. In acting, this is called sub-text (what the actor knows but never speaks to the audience). What is the strongest sub-text running through Linda's character in Act I? Focus on one idea. Cite the play. 200 words min.