See how a running total differs from a rate of change with parcel deliveries:...

https://www.active-bookmarks.win/running-totals-track-what-adds-up-while-rates-show-how-fast-it-changes-with

See how a running total differs from a rate of change with parcel deliveries: 120 parcels by noon is a total, while 30 parcels per hour is a pace over a time window. Clear units help you read the chart and explain what changed.