To find the unit rate of push-ups per day, you can divide the total number of push-ups by the total number of days.
Here, you have 22 push-ups over 2 days:
\[ \text{Unit rate} = \frac{22 \text{ push-ups}}{2 \text{ days}} = 11 \text{ push-ups per day} \]
So, the unit rate is 11 push-ups per day.