Question

average amount of sleep
last year, the oldest person averaged 2 more hours of sleep each night. how many hours of sleep did the oldest person average each night last year?
hours

Explanation:

Step1: Identify current sleep - hours

The oldest person in the graph is 20 years old and currently averages 7 hours of sleep.

Step2: Calculate last - year's sleep - hours

Add 2 hours to the current average. So, \(7 + 2=9\).

Answer:

9