Your question is Stress Testing the Model. Take a moment with it on the right.
Talk me through your thinking if you like. When you're confident, submit your answer and I'll grade it like a real screen (7/10 or better passes).
If you were to stress-test your model, which variable would you adjust first and why, and how would that reflect on Uber's unit economics for ride-hailing and delivery? Explain how you would isolate volume, pricing, take rate, incentives, and variable-cost assumptions in Uber's ride-hailing and delivery models. State which output you would monitor first, how the selected variable flows through revenue and contribution profit, and how you would test whether the conclusion is robust.