Question

Karl and Mark are walking through the woods dropping breadcrumbs to help them find their way home. After ten minutes, their breadbasket has 120 crumbs left. After thirteen minutes, the basket has 96 crumbs left. What is the rate of change (breadcrumbs per minute)?

Answer 1

In that three minute window (13 min - 10 min = 3 min), they used 24 bread crumbs (120 - 96 = 24).

So they're using 24 bread crumbs / 3 minutes or 8 crumbs/min.

The rate of change is a decrease of 8 crumbs/min from their basket.