The topic is students' weekly exercise so the question has to be about that. also, there are up to 7 days worth of data and there a 7 days in a week. so she most likely asked the question, "How many days do you exercise in a week?".
About 2884 people practice a sport/club 1133 people nap 618 people work 1751 people do homework 1442 people play games 1339 people eat a snack 1133 people are on social media ...after school