Final answer:
The unit rate of 63 jumping jacks in 3 minutes is calculated by dividing the number of jumping jacks by the minutes, resulting in a unit rate of 21 jumping jacks per minute.
Step-by-step explanation:
To express the given rate as a unit rate, we divide the number of jumping jacks by the number of minutes. The student performed 63 jumping jacks in 3 minutes. Therefore, the unit rate will be:
- 63 jumping jacks ÷ 3 minutes = 21 jumping jacks per minute.
Thus, the unit rate is 21 jumping jacks per minute.