why has eliza come, and why is she righteously indignant?

Eliza is righteously indignant in response to Higgins' treatment of her the day before. Higgins and Pickering are at Higgins's place on Wimpole Street when Eliza arrives at his home. She has cleaned up somewhat and wants it to be known that she arrived in a cab. She wants to take language lessons from Higgins, and she offers to pay him back some of the money that he threw into her basket the night before in exchange. She also implies that he was drunk when he gave her the money. Ultimately, she wants to work in a flower shop, which requires that her accent become more genteel.