The price of shoes decreases $21 over 7 days. Find the average rate of change per day.

Answer 1

average rate = 21/7
that is the average rate is $3 per day.
If you think of a graph the average rate is the slope of the declining line : )

Answer 2

Thank's Ms Pi—I mean Ms Pi!

Answer 3

Thank's Ms Pie—I mean Ms Pi!*