Angela's utility function is U(x1, x2) = (x1 + x2)^3. Her indifference curves are downward sloping parallel straight lines. Microeconomics Angela's utility function is U(x1, x2) = (x1 + x2)^3. Her indifference curves are downward sloping parallel straight lines. Answer: True Share this Share on FacebookTweet on TwitterPlus on Google+