The price of shoes decreases $21 over 7 days. Find the average rate of change per day.
Thank's Ms Pie—I mean Ms Pi!*
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 : )
To find the average rate of change per day, we need to divide the total change in price by the number of days.
Given that the price of shoes decreases by $21 over 7 days, the total change in price is $21, and the number of days is 7.
To find the average rate of change per day, we divide the total change in price by the number of days:
Average rate of change per day = Total change in price ÷ Number of days
In this case, the average rate of change per day is:
Average rate of change per day = $21 ÷ 7 days = $3 per day
Therefore, the average rate of change per day for the price of shoes is $3.