Gathering Problem Information Practice Test

Keisha is watching the paper towel dispenser problem. She counted towels in the morning (full roll), at lunch (half roll), and at the end of day (almost empty). She wrote the numbers down. What method did Keisha use to gather information?

Keisha is watching the paper towel dispenser problem. She counted towels in the morning (full roll), at lunch (half roll), and at the end of day (almost empty). She wrote the numbers down. What method did Keisha use to gather information?​