Welcome to your interview.
The question is on your right: Trend and Variance Analysis. Take a moment with it first.
Talk your thinking through with me if you like - when you're confident, submit your answer and I'll grade it like a real screen (7/10 or better passes). Discussion and graded submissions share your five interviewer interactions, so spend them well.
Walk me through how you would perform a trend and variance analysis on a dataset containing monthly marketing spend and customer acquisition metrics for Booking.com.