Can someone me with these 3 questions? i am really stuck on them. you so much. i'm offering 80 points.

You work for a lender that requires a 20% down payment and uses the standard depth to income ratio to determine a person‘s a little eligibility for a home loan of the following choose the person that you would rate the highest on their eligibility for a home loan

In which direction does the left side of the graph of this function point? f(x) = 3x3 - x2 + 4x - 2

Ana earns 2.5% simple interest on $2,000 in her savings account. she does not make any deposits or withdrawals. after 3 years, how much interest will ana have earned on her savings account?