Answer:Among the two characters, Walter and Linder, the conversation conveys Pride and Discrimination.
The line "And that's my sister over there and she's going to be a doctor - and we are very proud" tells that the entire family of Walters are a very proud family. That is overlooking the fact that Walter Lee states that, “...we come from people who had a lot of pride. I mean — we are very proud people”. Also, Walter has quite a bit of self-importance, you can see from the way he interrupts Lindner on multiple occasions as he tries to convince the man that they will not be taking his offer.
The general plot of A Raisin in the Sun centers around the Younger family selfishly trying to live out their own individual dreams- with Mama wanting to purchase a nice house for her family. Lindner clearly does not wish for the family to move into the house, and he is trying to convince them to sell it back. At one point he tries to “appeal” to Mama, implying that she is “older and wiser” and should understand why they cannot move into their new home which is canonically located in a predominantly White area. He is not happy about their decision, leaving them with an ominous, “I sure hope you people know what you're getting into”.
Step-by-step explanation:
This is what I wrote for mine, but I'm not sure how much this will help...