To find the unit rate of push-ups per day, you divide the total number of push-ups by the total number of days.
Given:
- Total push-ups = 18
- Total days = 3
Now, calculate the unit rate:
\[ \text{Unit rate} = \frac{\text{Total push-ups}}{\text{Total days}} = \frac{18 \text{ push-ups}}{3 \text{ days}} = 6 \text{ push-ups per day} \]
So, the unit rate is 6 push-ups per day.